Vulnerability-Lookup

ALSA-2026:18587

Vulnerability from osv_almalinux – Published: 2026-05-19 00:00 – Updated: 2026-06-07 18:33 – Source website

Summary

Moderate: kernel security update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: bonding: check xdp prog when set bond mode (CVE-2025-22105)
kernel: block: fix resource leak in blk_register_queue() error path (CVE-2025-37980)
kernel: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc (CVE-2025-38015)
kernel: espintcp: remove encap socket caching to avoid reference leak (CVE-2025-38097)
kernel: bpf: fix ktls panic with sockmap (CVE-2025-38166)
kernel: bpf: Do not include stack ptr register in precision backtracking bookkeeping (CVE-2025-38279)
kernel: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails (CVE-2025-38400)
kernel: nvmet: fix memory leak of bio integrity (CVE-2025-38405)
kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() (CVE-2025-38441)
kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime (CVE-2025-38470)
kernel: fs: writeback: fix use-after-free in __mark_inode_dirty() (CVE-2025-39866)
kernel: dm: fix NULL pointer dereference in __dm_suspend() (CVE-2025-40134)
kernel: wifi: mac80211_hwsim: fix typo in frequency notification (CVE-2026-23040)
kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:18587	ADVISORY
	https://access.redhat.com/security/cve/CVE-2025-22105	REPORT
	https://access.redhat.com/security/cve/CVE-2025-37980	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38015	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38097	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38166	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38279	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38400	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38405	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38441	REPORT
	https://access.redhat.com/security/cve/CVE-2025-38470	REPORT
	https://access.redhat.com/security/cve/CVE-2025-39866	REPORT
	https://access.redhat.com/security/cve/CVE-2025-40134	REPORT
	https://access.redhat.com/security/cve/CVE-2026-23040	REPORT
	https://access.redhat.com/security/cve/CVE-2026-23243	REPORT
	https://bugzilla.redhat.com/2360247	REPORT
	https://bugzilla.redhat.com/2367614	REPORT
	https://bugzilla.redhat.com/2373343	REPORT
	https://bugzilla.redhat.com/2376060	REPORT
	https://bugzilla.redhat.com/2376065	REPORT
	https://bugzilla.redhat.com/2379178	REPORT
	https://bugzilla.redhat.com/2383397	REPORT
	https://bugzilla.redhat.com/2383399	REPORT
	https://bugzilla.redhat.com/2383478	REPORT
	https://bugzilla.redhat.com/2383906	REPORT
	https://bugzilla.redhat.com/2396940	REPORT
	https://bugzilla.redhat.com/2414468	REPORT
	https://bugzilla.redhat.com/2436806	REPORT
	https://bugzilla.redhat.com/2448594	REPORT
	https://errata.almalinux.org/9/ALSA-2026-18587.html	ADVISORY

JSON

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  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.  \n\nSecurity Fix(es):  \n\n  * kernel: bonding: check xdp prog when set bond mode (CVE-2025-22105)\n  * kernel: block: fix resource leak in blk_register_queue() error path (CVE-2025-37980)\n  * kernel: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc (CVE-2025-38015)\n  * kernel: espintcp: remove encap socket caching to avoid reference leak (CVE-2025-38097)\n  * kernel: bpf: fix ktls panic with sockmap (CVE-2025-38166)\n  * kernel: bpf: Do not include stack ptr register in precision backtracking bookkeeping (CVE-2025-38279)\n  * kernel: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails (CVE-2025-38400)\n  * kernel: nvmet: fix memory leak of bio integrity (CVE-2025-38405)\n  * kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() (CVE-2025-38441)\n  * kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime (CVE-2025-38470)\n  * kernel: fs: writeback: fix use-after-free in __mark_inode_dirty() (CVE-2025-39866)\n  * kernel: dm: fix NULL pointer dereference in __dm_suspend() (CVE-2025-40134)\n  * kernel: wifi: mac80211_hwsim: fix typo in frequency notification (CVE-2026-23040)\n  * kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  \n\nAdditional Changes:  \n\nFor detailed information on changes in this release, see the AlmaLinuxRelease Notes linked from the References section.\n",
  "id": "ALSA-2026:18587",
  "modified": "2026-06-07T18:33:25Z",
  "published": "2026-05-19T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:18587"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-22105"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-37980"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38015"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38097"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38166"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38279"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38400"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38405"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38441"
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    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38470"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-39866"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-40134"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-23040"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-23243"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2360247"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2367614"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2373343"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2376060"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2376065"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2379178"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2383397"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2383399"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2383478"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2383906"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2396940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2414468"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2436806"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2448594"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-18587.html"
    }
  ],
  "related": [
    "CVE-2025-22105",
    "CVE-2025-37980",
    "CVE-2025-38015",
    "CVE-2025-38097",
    "CVE-2025-38166",
    "CVE-2025-38279",
    "CVE-2025-38400",
    "CVE-2025-38405",
    "CVE-2025-38441",
    "CVE-2025-38470",
    "CVE-2025-39866",
    "CVE-2025-40134",
    "CVE-2026-23040",
    "CVE-2026-23243"
  ],
  "summary": "Moderate: kernel security update"
}

CVE-2025-22105 (GCVE-0-2025-22105)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:12 – Updated: 2026-06-01 16:05

Title

bonding: check xdp prog when set bond mode

Summary

In the Linux kernel, the following vulnerability has been resolved: bonding: check xdp prog when set bond mode Following operations can trigger a warning[1]: ip netns add ns1 ip netns exec ns1 ip link add bond0 type bond mode balance-rr ip netns exec ns1 ip link set dev bond0 xdp obj af_xdp_kern.o sec xdp ip netns exec ns1 ip link set bond0 type bond mode broadcast ip netns del ns1 When delete the namespace, dev_xdp_uninstall() is called to remove xdp program on bond dev, and bond_xdp_set() will check the bond mode. If bond mode is changed after attaching xdp program, the warning may occur. Some bond modes (broadcast, etc.) do not support native xdp. Set bond mode with xdp program attached is not good. Add check for xdp program when set bond mode. [1] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 11 at net/core/dev.c:9912 unregister_netdevice_many_notify+0x8d9/0x930 Modules linked in: CPU: 0 UID: 0 PID: 11 Comm: kworker/u4:0 Not tainted 6.14.0-rc4 #107 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:unregister_netdevice_many_notify+0x8d9/0x930 Code: 00 00 48 c7 c6 6f e3 a2 82 48 c7 c7 d0 b3 96 82 e8 9c 10 3e ... RSP: 0018:ffffc90000063d80 EFLAGS: 00000282 RAX: 00000000ffffffa1 RBX: ffff888004959000 RCX: 00000000ffffdfff RDX: 0000000000000000 RSI: 00000000ffffffea RDI: ffffc90000063b48 RBP: ffffc90000063e28 R08: ffffffff82d39b28 R09: 0000000000009ffb R10: 0000000000000175 R11: ffffffff82d09b40 R12: ffff8880049598e8 R13: 0000000000000001 R14: dead000000000100 R15: ffffc90000045000 FS: 0000000000000000(0000) GS:ffff888007a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000d406b60 CR3: 000000000483e000 CR4: 00000000000006f0 Call Trace: <TASK> ? __warn+0x83/0x130 ? unregister_netdevice_many_notify+0x8d9/0x930 ? report_bug+0x18e/0x1a0 ? handle_bug+0x54/0x90 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? unregister_netdevice_many_notify+0x8d9/0x930 ? bond_net_exit_batch_rtnl+0x5c/0x90 cleanup_net+0x237/0x3d0 process_one_work+0x163/0x390 worker_thread+0x293/0x3b0 ? __pfx_worker_thread+0x10/0x10 kthread+0xec/0x1e0 ? __pfx_kthread+0x10/0x10 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2f/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> ---[ end trace 0000000000000000 ]---

Severity

No CVSS data available.

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/074de2f6706ea840b…
https://git.kernel.org/stable/c/5106da73b01668a1a…
https://git.kernel.org/stable/c/6f3af8055ee7ab69d…
https://git.kernel.org/stable/c/0dd4fac43bdea23cf…
https://git.kernel.org/stable/c/094ee6017ea09c11d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e , < 074de2f6706ea840bbf06599cdc194086fbae092 (git) Affected: 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e , < 5106da73b01668a1aa5d0f352b95d2b832b5caa7 (git) Affected: 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e , < 6f3af8055ee7ab69d1451f056fcd890df99c167e (git) Affected: 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e , < 0dd4fac43bdea23cfe4bb2a3eabb76d752ac32fb (git) Affected: 9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e , < 094ee6017ea09c11d6af187935a949df32803ce0 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.119 , ≤ 6.6.* (semver) Unaffected: 6.12.57 , ≤ 6.12.* (semver) Unaffected: 6.14.2 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
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          "programFiles": [
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CVE-2025-37980 (GCVE-0-2025-37980)

Vulnerability from cvelistv5 – Published: 2025-05-20 16:58 – Updated: 2026-09-08 08:41

Title

block: fix resource leak in blk_register_queue() error path

Summary

In the Linux kernel, the following vulnerability has been resolved: block: fix resource leak in blk_register_queue() error path When registering a queue fails after blk_mq_sysfs_register() is successful but the function later encounters an error, we need to clean up the blk_mq_sysfs resources. Add the missing blk_mq_sysfs_unregister() call in the error path to properly clean up these resources and prevent a memory leak.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/6af6d5feebf9423ab…
https://git.kernel.org/stable/c/549cbbd14bbec1246…
https://git.kernel.org/stable/c/41e43134ddda35949…
https://git.kernel.org/stable/c/55a7bb2708f7c7c5b…
https://git.kernel.org/stable/c/40f2eb9b531475dd0…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

8 products

Vendor	Product	Version
Linux	Linux	Affected: 320ae51feed5c2f13664aa05a76bec198967e04d , < 6af6d5feebf9423ab3b252831d1f52de31a8b5e0 (git) Affected: 320ae51feed5c2f13664aa05a76bec198967e04d , < 549cbbd14bbec12469ceb279b79c763c8a24224e (git) Affected: 320ae51feed5c2f13664aa05a76bec198967e04d , < 41e43134ddda35949974be40520460a12dda3502 (git) Affected: 320ae51feed5c2f13664aa05a76bec198967e04d , < 55a7bb2708f7c7c5b366d4e40916113168a3824c (git) Affected: 320ae51feed5c2f13664aa05a76bec198967e04d , < 40f2eb9b531475dd01b683fdaf61ca3cfd03a51e (git)
Linux	Linux	Affected: 3.13 Unaffected: 0 , < 3.13 (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.88 , ≤ 6.6.* (semver) Unaffected: 6.12.25 , ≤ 6.12.* (semver) Unaffected: 6.14.4 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-38015 (GCVE-0-2025-38015)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:28 – Updated: 2026-05-23 15:58

Title

dmaengine: idxd: fix memory leak in error handling path of idxd_alloc

Summary

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc Memory allocated for idxd is not freed if an error occurs during idxd_alloc(). To fix it, free the allocated memory in the reverse order of allocation before exiting the function in case of an error.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/64afd9a1f644b2766…
https://git.kernel.org/stable/c/6e94a2c3e4c166cd2…
https://git.kernel.org/stable/c/868dbce755ec92855…
https://git.kernel.org/stable/c/4f005eb68890698e5…
https://git.kernel.org/stable/c/46a5cca76c76c8606…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a8563a33a5e26064061f2fb34215c97f0e2995f4 , < 64afd9a1f644b27661420257dcc007d5009c99dd (git) Affected: a8563a33a5e26064061f2fb34215c97f0e2995f4 , < 6e94a2c3e4c166cd2736ac225fba5889fb1e8ac0 (git) Affected: a8563a33a5e26064061f2fb34215c97f0e2995f4 , < 868dbce755ec92855362d213f47e045a8388361a (git) Affected: a8563a33a5e26064061f2fb34215c97f0e2995f4 , < 4f005eb68890698e5abc6a3af04dab76f175c50c (git) Affected: a8563a33a5e26064061f2fb34215c97f0e2995f4 , < 46a5cca76c76c86063000a12936f8e7875295838 (git) Affected: 9526f051bedde01baa50081afe143a8bc5b8e6be (git) Affected: 6.0.9 , < 6.1 (semver)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.140 , ≤ 6.1.* (semver) Unaffected: 6.6.92 , ≤ 6.6.* (semver) Unaffected: 6.12.30 , ≤ 6.12.* (semver) Unaffected: 6.14.8 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2025-38097 (GCVE-0-2025-38097)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:13 – Updated: 2026-09-14 11:58

Title

espintcp: remove encap socket caching to avoid reference leak

Summary

In the Linux kernel, the following vulnerability has been resolved: espintcp: remove encap socket caching to avoid reference leak The current scheme for caching the encap socket can lead to reference leaks when we try to delete the netns. The reference chain is: xfrm_state -> enacp_sk -> netns Since the encap socket is a userspace socket, it holds a reference on the netns. If we delete the espintcp state (through flush or individual delete) before removing the netns, the reference on the socket is dropped and the netns is correctly deleted. Otherwise, the netns may not be reachable anymore (if all processes within the ns have terminated), so we cannot delete the xfrm state to drop its reference on the socket. This patch results in a small (~2% in my tests) performance regression. A GC-type mechanism could be added for the socket cache, to clear references if the state hasn't been used "recently", but it's a lot more complex than just not caching the socket.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/e32bafd08ee35feac…
https://git.kernel.org/stable/c/9673ca00e6c550306…
https://git.kernel.org/stable/c/e4cde54b46a87231c…
https://git.kernel.org/stable/c/b58a295d10065960b…
https://git.kernel.org/stable/c/9cbca30102028f9ad…
https://git.kernel.org/stable/c/74fd327767fb784c5…
https://git.kernel.org/stable/c/028363685bd0b7a19…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < e32bafd08ee35feacd47b05cc5bfe9cd9659cd25 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 9673ca00e6c5503069dc98780e2e89db0e663c16 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < e4cde54b46a87231c77256a633be1bef62687d69 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < b58a295d10065960bcb9d60cb8ca6ead9837cd27 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 9cbca30102028f9ad3d2098f935c4368f581fd07 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 74fd327767fb784c5875cf7c4ba1217f26020943 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 028363685bd0b7a19b4a820f82dd905b1dc83999 (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.141 , ≤ 6.1.* (semver) Unaffected: 6.6.93 , ≤ 6.6.* (semver) Unaffected: 6.12.31 , ≤ 6.12.* (semver) Unaffected: 6.14.9 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

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To clipboard

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CVE-2025-38166 (GCVE-0-2025-38166)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:36 – Updated: 2026-08-05 11:59

Title

bpf: fix ktls panic with sockmap

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: fix ktls panic with sockmap [ 2172.936997] ------------[ cut here ]------------ [ 2172.936999] kernel BUG at lib/iov_iter.c:629! ...... [ 2172.944996] PKRU: 55555554 [ 2172.945155] Call Trace: [ 2172.945299] <TASK> [ 2172.945428] ? die+0x36/0x90 [ 2172.945601] ? do_trap+0xdd/0x100 [ 2172.945795] ? iov_iter_revert+0x178/0x180 [ 2172.946031] ? iov_iter_revert+0x178/0x180 [ 2172.946267] ? do_error_trap+0x7d/0x110 [ 2172.946499] ? iov_iter_revert+0x178/0x180 [ 2172.946736] ? exc_invalid_op+0x50/0x70 [ 2172.946961] ? iov_iter_revert+0x178/0x180 [ 2172.947197] ? asm_exc_invalid_op+0x1a/0x20 [ 2172.947446] ? iov_iter_revert+0x178/0x180 [ 2172.947683] ? iov_iter_revert+0x5c/0x180 [ 2172.947913] tls_sw_sendmsg_locked.isra.0+0x794/0x840 [ 2172.948206] tls_sw_sendmsg+0x52/0x80 [ 2172.948420] ? inet_sendmsg+0x1f/0x70 [ 2172.948634] __sys_sendto+0x1cd/0x200 [ 2172.948848] ? find_held_lock+0x2b/0x80 [ 2172.949072] ? syscall_trace_enter+0x140/0x270 [ 2172.949330] ? __lock_release.isra.0+0x5e/0x170 [ 2172.949595] ? find_held_lock+0x2b/0x80 [ 2172.949817] ? syscall_trace_enter+0x140/0x270 [ 2172.950211] ? lockdep_hardirqs_on_prepare+0xda/0x190 [ 2172.950632] ? ktime_get_coarse_real_ts64+0xc2/0xd0 [ 2172.951036] __x64_sys_sendto+0x24/0x30 [ 2172.951382] do_syscall_64+0x90/0x170 ...... After calling bpf_exec_tx_verdict(), the size of msg_pl->sg may increase, e.g., when the BPF program executes bpf_msg_push_data(). If the BPF program sets cork_bytes and sg.size is smaller than cork_bytes, it will return -ENOSPC and attempt to roll back to the non-zero copy logic. However, during rollback, msg->msg_iter is reset, but since msg_pl->sg.size has been increased, subsequent executions will exceed the actual size of msg_iter. ''' iov_iter_revert(&msg->msg_iter, msg_pl->sg.size - orig_size); ''' The changes in this commit are based on the following considerations: 1. When cork_bytes is set, rolling back to non-zero copy logic is pointless and can directly go to zero-copy logic. 2. We can not calculate the correct number of bytes to revert msg_iter. Assume the original data is "abcdefgh" (8 bytes), and after 3 pushes by the BPF program, it becomes 11-byte data: "abc?de?fgh?". Then, we set cork_bytes to 6, which means the first 6 bytes have been processed, and the remaining 5 bytes "?fgh?" will be cached until the length meets the cork_bytes requirement. However, some data in "?fgh?" is not within 'sg->msg_iter' (but in msg_pl instead), especially the data "?" we pushed. So it doesn't seem as simple as just reverting through an offset of msg_iter. 3. For non-TLS sockets in tcp_bpf_sendmsg, when a "cork" situation occurs, the user-space send() doesn't return an error, and the returned length is the same as the input length parameter, even if some data is cached. Additionally, I saw that the current non-zero-copy logic for handling corking is written as: ''' line 1177 else if (ret != -EAGAIN) { if (ret == -ENOSPC) ret = 0; goto send_end; ''' So it's ok to just return 'copied' without error when a "cork" situation occurs.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/328cac3f9f8ae3947…
https://git.kernel.org/stable/c/2e36a81d388ec9c3f…
https://git.kernel.org/stable/c/57fbbe29e86042bba…
https://git.kernel.org/stable/c/603943f022a7fe5cc…
https://git.kernel.org/stable/c/54a3ecaeeeae8176d…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca , < 328cac3f9f8ae394748485e769a527518a9137c8 (git) Affected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca , < 2e36a81d388ec9c3f78b6223f7eda2088cd40adb (git) Affected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca , < 57fbbe29e86042bbaa31c1a30d2afa16c427e3f7 (git) Affected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca , < 603943f022a7fe5cc83ca7005faf34798fb7853f (git) Affected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca , < 54a3ecaeeeae8176da8badbd7d72af1017032c39 (git)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (semver) Unaffected: 6.1.142 , ≤ 6.1.* (semver) Unaffected: 6.6.94 , ≤ 6.6.* (semver) Unaffected: 6.12.34 , ≤ 6.12.* (semver) Unaffected: 6.15.3 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix ktls panic with sockmap\n\n[ 2172.936997] ------------[ cut here ]------------\n[ 2172.936999] kernel BUG at lib/iov_iter.c:629!\n......\n[ 2172.944996] PKRU: 55555554\n[ 2172.945155] Call Trace:\n[ 2172.945299]  \u003cTASK\u003e\n[ 2172.945428]  ? die+0x36/0x90\n[ 2172.945601]  ? do_trap+0xdd/0x100\n[ 2172.945795]  ? iov_iter_revert+0x178/0x180\n[ 2172.946031]  ? iov_iter_revert+0x178/0x180\n[ 2172.946267]  ? do_error_trap+0x7d/0x110\n[ 2172.946499]  ? iov_iter_revert+0x178/0x180\n[ 2172.946736]  ? exc_invalid_op+0x50/0x70\n[ 2172.946961]  ? iov_iter_revert+0x178/0x180\n[ 2172.947197]  ? asm_exc_invalid_op+0x1a/0x20\n[ 2172.947446]  ? iov_iter_revert+0x178/0x180\n[ 2172.947683]  ? iov_iter_revert+0x5c/0x180\n[ 2172.947913]  tls_sw_sendmsg_locked.isra.0+0x794/0x840\n[ 2172.948206]  tls_sw_sendmsg+0x52/0x80\n[ 2172.948420]  ? inet_sendmsg+0x1f/0x70\n[ 2172.948634]  __sys_sendto+0x1cd/0x200\n[ 2172.948848]  ? find_held_lock+0x2b/0x80\n[ 2172.949072]  ? syscall_trace_enter+0x140/0x270\n[ 2172.949330]  ? __lock_release.isra.0+0x5e/0x170\n[ 2172.949595]  ? find_held_lock+0x2b/0x80\n[ 2172.949817]  ? syscall_trace_enter+0x140/0x270\n[ 2172.950211]  ? lockdep_hardirqs_on_prepare+0xda/0x190\n[ 2172.950632]  ? ktime_get_coarse_real_ts64+0xc2/0xd0\n[ 2172.951036]  __x64_sys_sendto+0x24/0x30\n[ 2172.951382]  do_syscall_64+0x90/0x170\n......\n\nAfter calling bpf_exec_tx_verdict(), the size of msg_pl-\u003esg may increase,\ne.g., when the BPF program executes bpf_msg_push_data().\n\nIf the BPF program sets cork_bytes and sg.size is smaller than cork_bytes,\nit will return -ENOSPC and attempt to roll back to the non-zero copy\nlogic. However, during rollback, msg-\u003emsg_iter is reset, but since\nmsg_pl-\u003esg.size has been increased, subsequent executions will exceed the\nactual size of msg_iter.\n\u0027\u0027\u0027\niov_iter_revert(\u0026msg-\u003emsg_iter, msg_pl-\u003esg.size - orig_size);\n\u0027\u0027\u0027\n\nThe changes in this commit are based on the following considerations:\n\n1. When cork_bytes is set, rolling back to non-zero copy logic is\npointless and can directly go to zero-copy logic.\n\n2. We can not calculate the correct number of bytes to revert msg_iter.\n\nAssume the original data is \"abcdefgh\" (8 bytes), and after 3 pushes\nby the BPF program, it becomes 11-byte data: \"abc?de?fgh?\".\nThen, we set cork_bytes to 6, which means the first 6 bytes have been\nprocessed, and the remaining 5 bytes \"?fgh?\" will be cached until the\nlength meets the cork_bytes requirement.\n\nHowever, some data in \"?fgh?\" is not within \u0027sg-\u003emsg_iter\u0027\n(but in msg_pl instead), especially the data \"?\" we pushed.\n\nSo it doesn\u0027t seem as simple as just reverting through an offset of\nmsg_iter.\n\n3. For non-TLS sockets in tcp_bpf_sendmsg, when a \"cork\" situation occurs,\nthe user-space send() doesn\u0027t return an error, and the returned length is\nthe same as the input length parameter, even if some data is cached.\n\nAdditionally, I saw that the current non-zero-copy logic for handling\ncorking is written as:\n\u0027\u0027\u0027\nline 1177\nelse if (ret != -EAGAIN) {\n\tif (ret == -ENOSPC)\n\t\tret = 0;\n\tgoto send_end;\n\u0027\u0027\u0027\n\nSo it\u0027s ok to just return \u0027copied\u0027 without error when a \"cork\" situation\noccurs."
        }
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        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The trigger is a local `sendmsg()`/`sendto()` syscall on a kTLS socket enrolled in a sockmap, and the data driving the bug is the calling process\u0027s own send buffer plus the sk_msg BPF verdict \u2014 not data received from a remote peer. This is the kTLS transmit path combined with BPF/sockmap, both of which are locally reachable only.\nAC:L - Exploitation is fully deterministic \u2014 no race, no memory-layout grooming, no timing window; the attacker simply issues a `send()` whose length falls below the program\u0027s `cork_bytes` threshold and the `BUG()` fires every time. The attacker additionally chooses ITER_UBUF vs ITER_IOVEC by controlling `nr_segs`, selecting between the guaranteed panic and the out-of-bounds iterator walk.\nPR:L - Enabling kTLS TX requires no capability whatsoever (net/tls contains no `capable()` checks), and in the standard sockmap deployment the `sk_msg` program is installed by the platform/service mesh with sockets auto-enrolled on connect, so an ordinary unprivileged local user needs only a socket and a `send()` call. Where the attacker supplies the BPF program, `bpf_token_capable()` also grants `CAP_BPF`/`CAP_NET_ADMIN` inside a user namespace via a delegated BPF token.\nUI:N - The attacker performs every step themselves \u2014 create socket, enable kTLS, call send(). No action by any other user or administrator is needed at exploitation time.\nS:U - The corruption and the crash are confined to the kernel\u0027s own memory and the attacking task\u0027s socket state; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - With \u22652 iovecs, `iov_iter_revert()` walks backwards off the front of `iovstack[]` in an unbounded loop, reading kernel-stack qwords as `iov_len` and leaving `i-\u003e__iov` pointing at out-of-bounds kernel memory adjacent to the attacker-seeded `sockaddr_storage`; `i-\u003ecount` is simultaneously inflated past the end of the user buffer, and the corrupted iterator is then used for further copies. This unbounded OOB kernel read plus live-iterator corruption is a disclosure primitive.\nI:H - The faulty revert writes an out-of-bounds pointer, inflated `nr_segs`, and an `iov_offset` derived from out-of-bounds kernel memory into a live kernel iterator whose neighbouring stack contents the attacker controls via `msg_name`, and the `sg.size`/`sk_mem_charge` accounting diverges from reality. Memory-safety corruption of this nature is scored High.\nA:H - The common single-buffer case hits a guaranteed `BUG()` at lib/iov_iter.c:629 while holding both `tls_ctx-\u003etx_lock` and the socket lock, so the killed task self-deadlocks in `tls_sk_proto_close()` during exit \u2014 an unkillable D-state task with a permanently wedged socket and leaked memory. On systems with `panic_on_oops` it is an immediate full system panic, and it is trivially repeatable."
            }
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        "dateUpdated": "2026-08-05T11:59:59.787Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/328cac3f9f8ae394748485e769a527518a9137c8"
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        {
          "url": "https://git.kernel.org/stable/c/2e36a81d388ec9c3f78b6223f7eda2088cd40adb"
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        {
          "url": "https://git.kernel.org/stable/c/57fbbe29e86042bbaa31c1a30d2afa16c427e3f7"
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        {
          "url": "https://git.kernel.org/stable/c/603943f022a7fe5cc83ca7005faf34798fb7853f"
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        {
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      "title": "bpf: fix ktls panic with sockmap",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38166",
    "datePublished": "2025-07-03T08:36:06.372Z",
    "dateReserved": "2025-04-16T04:51:23.991Z",
    "dateUpdated": "2026-08-05T11:59:59.787Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-38279 (GCVE-0-2025-38279)

Vulnerability from cvelistv5 – Published: 2025-07-10 07:41 – Updated: 2026-05-23 15:59

Title

bpf: Do not include stack ptr register in precision backtracking bookkeeping

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Do not include stack ptr register in precision backtracking bookkeeping Yi Lai reported an issue ([1]) where the following warning appears in kernel dmesg: [ 60.643604] verifier backtracking bug [ 60.643635] WARNING: CPU: 10 PID: 2315 at kernel/bpf/verifier.c:4302 __mark_chain_precision+0x3a6c/0x3e10 [ 60.648428] Modules linked in: bpf_testmod(OE) [ 60.650471] CPU: 10 UID: 0 PID: 2315 Comm: test_progs Tainted: G OE 6.15.0-rc4-gef11287f8289-dirty #327 PREEMPT(full) [ 60.654385] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE [ 60.656682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 60.660475] RIP: 0010:__mark_chain_precision+0x3a6c/0x3e10 [ 60.662814] Code: 5a 30 84 89 ea e8 c4 d9 01 00 80 3d 3e 7d d8 04 00 0f 85 60 fa ff ff c6 05 31 7d d8 04 01 48 c7 c7 00 58 30 84 e8 c4 06 a5 ff <0f> 0b e9 46 fa ff ff 48 ... [ 60.668720] RSP: 0018:ffff888116cc7298 EFLAGS: 00010246 [ 60.671075] RAX: 54d70e82dfd31900 RBX: ffff888115b65e20 RCX: 0000000000000000 [ 60.673659] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff [ 60.676241] RBP: 0000000000000400 R08: ffff8881f6f23bd3 R09: 1ffff1103ede477a [ 60.678787] R10: dffffc0000000000 R11: ffffed103ede477b R12: ffff888115b60ae8 [ 60.681420] R13: 1ffff11022b6cbc4 R14: 00000000fffffff2 R15: 0000000000000001 [ 60.684030] FS: 00007fc2aedd80c0(0000) GS:ffff88826fa8a000(0000) knlGS:0000000000000000 [ 60.686837] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.689027] CR2: 000056325369e000 CR3: 000000011088b002 CR4: 0000000000370ef0 [ 60.691623] Call Trace: [ 60.692821] <TASK> [ 60.693960] ? __pfx_verbose+0x10/0x10 [ 60.695656] ? __pfx_disasm_kfunc_name+0x10/0x10 [ 60.697495] check_cond_jmp_op+0x16f7/0x39b0 [ 60.699237] do_check+0x58fa/0xab10 ... Further analysis shows the warning is at line 4302 as below: 4294 /* static subprog call instruction, which 4295 * means that we are exiting current subprog, 4296 * so only r1-r5 could be still requested as 4297 * precise, r0 and r6-r10 or any stack slot in 4298 * the current frame should be zero by now 4299 */ 4300 if (bt_reg_mask(bt) & ~BPF_REGMASK_ARGS) { 4301 verbose(env, "BUG regs %x\n", bt_reg_mask(bt)); 4302 WARN_ONCE(1, "verifier backtracking bug"); 4303 return -EFAULT; 4304 } With the below test (also in the next patch): __used __naked static void __bpf_jmp_r10(void) { asm volatile ( "r2 = 2314885393468386424 ll;" "goto +0;" "if r2 <= r10 goto +3;" "if r1 >= -1835016 goto +0;" "if r2 <= 8 goto +0;" "if r3 <= 0 goto +0;" "exit;" ::: __clobber_all); } SEC("?raw_tp") __naked void bpf_jmp_r10(void) { asm volatile ( "r3 = 0 ll;" "call __bpf_jmp_r10;" "r0 = 0;" "exit;" ::: __clobber_all); } The following is the verifier failure log: 0: (18) r3 = 0x0 ; R3_w=0 2: (85) call pc+2 caller: R10=fp0 callee: frame1: R1=ctx() R3_w=0 R10=fp0 5: frame1: R1=ctx() R3_w=0 R10=fp0 ; asm volatile (" \ @ verifier_precision.c:184 5: (18) r2 = 0x20202000256c6c78 ; frame1: R2_w=0x20202000256c6c78 7: (05) goto pc+0 8: (bd) if r2 <= r10 goto pc+3 ; frame1: R2_w=0x20202000256c6c78 R10=fp0 9: (35) if r1 >= 0xffe3fff8 goto pc+0 ; frame1: R1=ctx() 10: (b5) if r2 <= 0x8 goto pc+0 mark_precise: frame1: last_idx 10 first_idx 0 subseq_idx -1 mark_precise: frame1: regs=r2 stack= before 9: (35) if r1 >= 0xffe3fff8 goto pc+0 mark_precise: frame1: regs=r2 stack= before 8: (bd) if r2 <= r10 goto pc+3 mark_preci ---truncated---

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/4265682c29c92f52c…
https://git.kernel.org/stable/c/ac49b7560b4b08b1e…
https://git.kernel.org/stable/c/e2d2115e56c4a0237…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 407958a0e980b9e1842ab87b5a1040521e1e24e9 , < 4265682c29c92f52c0da6fad5a79b5801462c8de (git) Affected: 407958a0e980b9e1842ab87b5a1040521e1e24e9 , < ac49b7560b4b08b1e4043a29214cc7ad77644c00 (git) Affected: 407958a0e980b9e1842ab87b5a1040521e1e24e9 , < e2d2115e56c4a02377189bfc3a9a7933552a7b0f (git) Affected: fc2778c42f99c7de52fc004157b3c3ee4dcc208a (git) Affected: 6.4.4 , < 6.5 (semver)
Linux	Linux	Affected: 6.5 Unaffected: 0 , < 6.5 (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.3 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf_verifier.h",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4265682c29c92f52c0da6fad5a79b5801462c8de",
              "status": "affected",
              "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9",
              "versionType": "git"
            },
            {
              "lessThan": "ac49b7560b4b08b1e4043a29214cc7ad77644c00",
              "status": "affected",
              "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9",
              "versionType": "git"
            },
            {
              "lessThan": "e2d2115e56c4a02377189bfc3a9a7933552a7b0f",
              "status": "affected",
              "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fc2778c42f99c7de52fc004157b3c3ee4dcc208a",
              "versionType": "git"
            },
            {
              "lessThan": "6.5",
              "status": "affected",
              "version": "6.4.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf_verifier.h",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.37",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.3",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.4.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Do not include stack ptr register in precision backtracking bookkeeping\n\nYi Lai reported an issue ([1]) where the following warning appears\nin kernel dmesg:\n  [   60.643604] verifier backtracking bug\n  [   60.643635] WARNING: CPU: 10 PID: 2315 at kernel/bpf/verifier.c:4302 __mark_chain_precision+0x3a6c/0x3e10\n  [   60.648428] Modules linked in: bpf_testmod(OE)\n  [   60.650471] CPU: 10 UID: 0 PID: 2315 Comm: test_progs Tainted: G           OE       6.15.0-rc4-gef11287f8289-dirty #327 PREEMPT(full)\n  [   60.654385] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n  [   60.656682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n  [   60.660475] RIP: 0010:__mark_chain_precision+0x3a6c/0x3e10\n  [   60.662814] Code: 5a 30 84 89 ea e8 c4 d9 01 00 80 3d 3e 7d d8 04 00 0f 85 60 fa ff ff c6 05 31 7d d8 04\n                       01 48 c7 c7 00 58 30 84 e8 c4 06 a5 ff \u003c0f\u003e 0b e9 46 fa ff ff 48 ...\n  [   60.668720] RSP: 0018:ffff888116cc7298 EFLAGS: 00010246\n  [   60.671075] RAX: 54d70e82dfd31900 RBX: ffff888115b65e20 RCX: 0000000000000000\n  [   60.673659] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff\n  [   60.676241] RBP: 0000000000000400 R08: ffff8881f6f23bd3 R09: 1ffff1103ede477a\n  [   60.678787] R10: dffffc0000000000 R11: ffffed103ede477b R12: ffff888115b60ae8\n  [   60.681420] R13: 1ffff11022b6cbc4 R14: 00000000fffffff2 R15: 0000000000000001\n  [   60.684030] FS:  00007fc2aedd80c0(0000) GS:ffff88826fa8a000(0000) knlGS:0000000000000000\n  [   60.686837] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  [   60.689027] CR2: 000056325369e000 CR3: 000000011088b002 CR4: 0000000000370ef0\n  [   60.691623] Call Trace:\n  [   60.692821]  \u003cTASK\u003e\n  [   60.693960]  ? __pfx_verbose+0x10/0x10\n  [   60.695656]  ? __pfx_disasm_kfunc_name+0x10/0x10\n  [   60.697495]  check_cond_jmp_op+0x16f7/0x39b0\n  [   60.699237]  do_check+0x58fa/0xab10\n  ...\n\nFurther analysis shows the warning is at line 4302 as below:\n\n  4294                 /* static subprog call instruction, which\n  4295                  * means that we are exiting current subprog,\n  4296                  * so only r1-r5 could be still requested as\n  4297                  * precise, r0 and r6-r10 or any stack slot in\n  4298                  * the current frame should be zero by now\n  4299                  */\n  4300                 if (bt_reg_mask(bt) \u0026 ~BPF_REGMASK_ARGS) {\n  4301                         verbose(env, \"BUG regs %x\\n\", bt_reg_mask(bt));\n  4302                         WARN_ONCE(1, \"verifier backtracking bug\");\n  4303                         return -EFAULT;\n  4304                 }\n\nWith the below test (also in the next patch):\n  __used __naked static void __bpf_jmp_r10(void)\n  {\n\tasm volatile (\n\t\"r2 = 2314885393468386424 ll;\"\n\t\"goto +0;\"\n\t\"if r2 \u003c= r10 goto +3;\"\n\t\"if r1 \u003e= -1835016 goto +0;\"\n\t\"if r2 \u003c= 8 goto +0;\"\n\t\"if r3 \u003c= 0 goto +0;\"\n\t\"exit;\"\n\t::: __clobber_all);\n  }\n\n  SEC(\"?raw_tp\")\n  __naked void bpf_jmp_r10(void)\n  {\n\tasm volatile (\n\t\"r3 = 0 ll;\"\n\t\"call __bpf_jmp_r10;\"\n\t\"r0 = 0;\"\n\t\"exit;\"\n\t::: __clobber_all);\n  }\n\nThe following is the verifier failure log:\n  0: (18) r3 = 0x0                      ; R3_w=0\n  2: (85) call pc+2\n  caller:\n   R10=fp0\n  callee:\n   frame1: R1=ctx() R3_w=0 R10=fp0\n  5: frame1: R1=ctx() R3_w=0 R10=fp0\n  ; asm volatile (\"                                 \\ @ verifier_precision.c:184\n  5: (18) r2 = 0x20202000256c6c78       ; frame1: R2_w=0x20202000256c6c78\n  7: (05) goto pc+0\n  8: (bd) if r2 \u003c= r10 goto pc+3        ; frame1: R2_w=0x20202000256c6c78 R10=fp0\n  9: (35) if r1 \u003e= 0xffe3fff8 goto pc+0         ; frame1: R1=ctx()\n  10: (b5) if r2 \u003c= 0x8 goto pc+0\n  mark_precise: frame1: last_idx 10 first_idx 0 subseq_idx -1\n  mark_precise: frame1: regs=r2 stack= before 9: (35) if r1 \u003e= 0xffe3fff8 goto pc+0\n  mark_precise: frame1: regs=r2 stack= before 8: (bd) if r2 \u003c= r10 goto pc+3\n  mark_preci\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:59:20.262Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4265682c29c92f52c0da6fad5a79b5801462c8de"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac49b7560b4b08b1e4043a29214cc7ad77644c00"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2d2115e56c4a02377189bfc3a9a7933552a7b0f"
        }
      ],
      "title": "bpf: Do not include stack ptr register in precision backtracking bookkeeping",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38279",
    "datePublished": "2025-07-10T07:41:58.184Z",
    "dateReserved": "2025-04-16T04:51:23.998Z",
    "dateUpdated": "2026-05-23T15:59:20.262Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-38400 (GCVE-0-2025-38400)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-07-14 12:42

Title

nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails.

Summary

In the Linux kernel, the following vulnerability has been resolved: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails. syzbot reported a warning below [1] following a fault injection in nfs_fs_proc_net_init(). [0] When nfs_fs_proc_net_init() fails, /proc/net/rpc/nfs is not removed. Later, rpc_proc_exit() tries to remove /proc/net/rpc, and the warning is logged as the directory is not empty. Let's handle the error of nfs_fs_proc_net_init() properly. [0]: FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:123) should_fail_ex (lib/fault-inject.c:73 lib/fault-inject.c:174) should_failslab (mm/failslab.c:46) kmem_cache_alloc_noprof (mm/slub.c:4178 mm/slub.c:4204) __proc_create (fs/proc/generic.c:427) proc_create_reg (fs/proc/generic.c:554) proc_create_net_data (fs/proc/proc_net.c:120) nfs_fs_proc_net_init (fs/nfs/client.c:1409) nfs_net_init (fs/nfs/inode.c:2600) ops_init (net/core/net_namespace.c:138) setup_net (net/core/net_namespace.c:443) copy_net_ns (net/core/net_namespace.c:576) create_new_namespaces (kernel/nsproxy.c:110) unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) ksys_unshare (kernel/fork.c:3123) __x64_sys_unshare (kernel/fork.c:3190) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> [1]: remove_proc_entry: removing non-empty directory 'net/rpc', leaking at least 'nfs' WARNING: CPU: 1 PID: 6120 at fs/proc/generic.c:727 remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Modules linked in: CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Code: 3c 02 00 0f 85 85 00 00 00 48 8b 93 d8 00 00 00 4d 89 f0 4c 89 e9 48 c7 c6 40 ba a2 8b 48 c7 c7 60 b9 a2 8b e8 33 81 1d ff 90 <0f> 0b 90 90 e9 5f fe ff ff e8 04 69 5e ff 90 48 b8 00 00 00 00 00 RSP: 0018:ffffc90003637b08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88805f534140 RCX: ffffffff817a92c8 RDX: ffff88807da99e00 RSI: ffffffff817a92d5 RDI: 0000000000000001 RBP: ffff888033431ac0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888033431a00 R13: ffff888033431ae4 R14: ffff888033184724 R15: dffffc0000000000 FS: 0000555580328500(0000) GS:ffff888124a62000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f71733743e0 CR3: 000000007f618000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> sunrpc_exit_net+0x46/0x90 net/sunrpc/sunrpc_syms.c:76 ops_exit_list net/core/net_namespace.c:200 [inline] ops_undo_list+0x2eb/0xab0 net/core/net_namespace.c:253 setup_net+0x2e1/0x510 net/core/net_namespace.c:457 copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:574 create_new_namespaces+0x3ea/0xa90 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:218 ksys_unshare+0x45b/0xa40 kernel/fork.c:3121 __do_sys_unshare kernel/fork.c:3192 [inline] __se_sys_unshare kernel/fork.c:3190 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3190 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa1a6b8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c ---truncated---

Severity

No CVSS data available.

Assigner

Linux mitre root

References

11 references

URL	Tags
https://git.kernel.org/stable/c/8785701fd7cd52ae7…
https://git.kernel.org/stable/c/412534a1fb76958b8…
https://git.kernel.org/stable/c/b92397ce96743e4cc…
https://git.kernel.org/stable/c/7701c245ff1ac1a12…
https://git.kernel.org/stable/c/d0877c479f44fe475…
https://git.kernel.org/stable/c/3c94212b57bedec3a…
https://git.kernel.org/stable/c/6acf340f8c1d296bc…
https://git.kernel.org/stable/c/e8d6f3ab59468e230…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

5 products

Vendor	Product	Version
Linux	Linux	Affected: 31dd0cda5aa0547de447aaf184812f85ccc34044 , < 8785701fd7cd52ae74c0d2b35b82568df74e9dbb (git) Affected: 6eef21eb7a165601882dad0419a630e32d2d7a2c , < 412534a1fb76958b88dca48360c6f3ad4f3390f4 (git) Affected: 0bbd429260821dfb81478749837d3e6377949ac6 , < b92397ce96743e4cc090207e2df2a856cb4cef08 (git) Affected: 9dd86e9d34b1078dcd647220e96a205028bf4e6f , < 7701c245ff1ac1a126bf431e72b24547519046ff (git) Affected: 53a0365c9f9f66e1a981bf9188d8716d682e0739 , < d0877c479f44fe475f4c8c02c88ce9ad43e90298 (git) Affected: d47151b79e3220e72ae323b8b8e9d6da20dc884e , < 3c94212b57bedec3a386ef3da1ef00602f5c3d1d (git) Affected: d47151b79e3220e72ae323b8b8e9d6da20dc884e , < 6acf340f8c1d296bcf535986175f5d0d6f2aab09 (git) Affected: d47151b79e3220e72ae323b8b8e9d6da20dc884e , < e8d6f3ab59468e230f3253efe5cb63efa35289f7 (git) Affected: e05194baae299f2148ab5f6bab659c6ce8d1f6d3 (git) Affected: 5.4.276 , < 5.4.296 (semver) Affected: 5.10.217 , < 5.10.240 (semver) Affected: 5.15.159 , < 5.15.187 (semver) Affected: 6.1.91 , < 6.1.144 (semver) Affected: 6.6.31 , < 6.6.97 (semver) Affected: 6.8.10 , < 6.9 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 5.4.296 , ≤ 5.4.* (semver) Unaffected: 5.10.240 , ≤ 5.10.* (semver) Unaffected: 5.15.187 , ≤ 5.15.* (semver) Unaffected: 6.1.144 , ≤ 6.1.* (semver) Unaffected: 6.6.97 , ≤ 6.6.* (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.6 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:37:33.631Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
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                "versionType": "custom"
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            "versions": [
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                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-14T12:42:00.062Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8785701fd7cd52ae74c0d2b35b82568df74e9dbb",
              "status": "affected",
              "version": "31dd0cda5aa0547de447aaf184812f85ccc34044",
              "versionType": "git"
            },
            {
              "lessThan": "412534a1fb76958b88dca48360c6f3ad4f3390f4",
              "status": "affected",
              "version": "6eef21eb7a165601882dad0419a630e32d2d7a2c",
              "versionType": "git"
            },
            {
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CVE-2025-38405 (GCVE-0-2025-38405)

Vulnerability from cvelistv5 – Published: 2025-07-25 13:12 – Updated: 2026-08-05 12:01

Title

nvmet: fix memory leak of bio integrity

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet: fix memory leak of bio integrity If nvmet receives commands with metadata there is a continuous memory leak of kmalloc-128 slab or more precisely bio->bi_integrity. Since commit bf4c89fc8797 ("block: don't call bio_uninit from bio_endio") each user of bio_init has to use bio_uninit as well. Otherwise the bio integrity is not getting free. Nvmet uses bio_init for inline bios. Uninit the inline bio to complete deallocation of integrity in bio.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/431e58d56fcb5ff1f…
https://git.kernel.org/stable/c/2e2028fcf924d1c6d…
https://git.kernel.org/stable/c/190f4c2c863af7cc5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 431e58d56fcb5ff1f9eb630724a922e0d2a941df (git) Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 2e2028fcf924d1c6df017033c8d6e28b735a0508 (git) Affected: bf4c89fc8797f5c0964a0c3d561fbe7e8483b62f , < 190f4c2c863af7cc5bb354b70e0805f06419c038 (git) Affected: 64149da0fddbbfe43e11c0348d8c8b4171dae3a2 (git) Affected: 6.10.10 , < 6.11 (semver)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.37 , ≤ 6.12.* (semver) Unaffected: 6.15.6 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

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              "value": "AV:N - The leak is driven entirely by NVMe commands received by the nvmet target from a remote host, and the affected metadata/PI path is only reachable via nvmet-rdma (the sole transport setting NVMF_METADATA_SUPPORTED), which runs over routable RoCEv2/iWARP fabrics. No local access to the target is needed.\nAC:L - Every read/write command carrying protection information leaks a bip allocation with 100% reliability \u2014 no race, no memory-layout dependency, and the attacker fully controls the I/O size that selects the vulnerable inline-bio path. Repetition to exhaust memory is unconstrained.\nPR:N - NVMe-oF requires no authentication by default; the target admits hosts based on a client-supplied, trivially spoofable host NQN or with allow_any_host enabled, so an unauthenticated remote peer can establish a queue and issue I/O.\nUI:N - The leak occurs purely from processing attacker-sent NVMe I/O commands; no action by any local user or administrator is required once the target is serving.\nS:U - The leaked kernel slab memory and its consequences are confined to the kernel of the target host; no security boundary such as a hypervisor or IOMMU domain is crossed.\nC:N - The orphaned bio_integrity_payload is never re-read or exposed, and no out-of-bounds or uninitialized data is returned to the attacker, so there is no information disclosure.\nI:N - bio_init() resets bi_integrity to NULL on reuse, so the leak causes no use-after-free, double-free, or any other memory corruption \u2014 no kernel data is modified.\nA:H - The leak is unbounded and driven at line-rate I/O speed by the remote attacker, so sustained traffic exhausts kernel slab memory leading to OOM kills, allocation failures and system hang/panic on the storage target."
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CVE-2025-38441 (GCVE-0-2025-38441)

Vulnerability from cvelistv5 – Published: 2025-07-25 15:27 – Updated: 2026-05-23 15:59

Title

netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() syzbot found a potential access to uninit-value in nf_flow_pppoe_proto() Blamed commit forgot the Ethernet header. BUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27 nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline] nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623 nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline] nf_ingress net/core/dev.c:5742 [inline] __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837 __netif_receive_skb_one_core net/core/dev.c:5975 [inline] __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090 netif_receive_skb_internal net/core/dev.c:6176 [inline] netif_receive_skb+0x57/0x630 net/core/dev.c:6235 tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485 tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938 tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xb4b/0x1580 fs/read_write.c:686 ksys_write fs/read_write.c:738 [inline] __do_sys_write fs/read_write.c:749 [inline]

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/a3aea97d55964e70a…
https://git.kernel.org/stable/c/eed8960b289327235…
https://git.kernel.org/stable/c/9fbc49429a23b0259…
https://git.kernel.org/stable/c/e0dd2e9729660f3f4…
https://git.kernel.org/stable/c/cfbf0665969af2c69…
https://git.kernel.org/stable/c/18cdb3d982da8976b…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d06977b9a4109f8738bb276125eb6a0b772bc433 , < a3aea97d55964e70a1e6426aa4cafdc036e8a2dd (git) Affected: 8bf7c76a2a207ca2b4cfda0a279192adf27678d7 , < eed8960b289327235185b7c32649c3470a3e969b (git) Affected: a2471d271042ea18e8a6babc132a8716bb2f08b9 , < 9fbc49429a23b02595ba82536c5ea425fdabb221 (git) Affected: 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf , < e0dd2e9729660f3f4fcb16e0aef87342911528ef (git) Affected: 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf , < cfbf0665969af2c69d10c377d4c3d306e717efb4 (git) Affected: 87b3593bed1868b2d9fe096c01bcdf0ea86cbebf , < 18cdb3d982da8976b28d57691eb256ec5688fad2 (git) Affected: cf366ee3bc1b7d1c76a882640ba3b3f8f1039163 (git) Affected: 5.15.157 , < 5.15.189 (semver) Affected: 6.1.88 , < 6.1.146 (semver) Affected: 6.6.29 , < 6.6.99 (semver) Affected: 6.8.8 , < 6.9 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 5.15.189 , ≤ 5.15.* (semver) Unaffected: 6.1.146 , ≤ 6.1.* (semver) Unaffected: 6.6.99 , ≤ 6.6.* (semver) Unaffected: 6.12.39 , ≤ 6.12.* (semver) Unaffected: 6.15.7 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)

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JSON

To clipboard

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()\n\nsyzbot found a potential access to uninit-value in nf_flow_pppoe_proto()\n\nBlamed commit forgot the Ethernet header.\n\nBUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n  nf_flow_offload_inet_hook+0x7e4/0x940 net/netfilter/nf_flow_table_inet.c:27\n  nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]\n  nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623\n  nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline]\n  nf_ingress net/core/dev.c:5742 [inline]\n  __netif_receive_skb_core+0x4aff/0x70c0 net/core/dev.c:5837\n  __netif_receive_skb_one_core net/core/dev.c:5975 [inline]\n  __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6090\n  netif_receive_skb_internal net/core/dev.c:6176 [inline]\n  netif_receive_skb+0x57/0x630 net/core/dev.c:6235\n  tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485\n  tun_get_user+0x4ee0/0x6b40 drivers/net/tun.c:1938\n  tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1984\n  new_sync_write fs/read_write.c:593 [inline]\n  vfs_write+0xb4b/0x1580 fs/read_write.c:686\n  ksys_write fs/read_write.c:738 [inline]\n  __do_sys_write fs/read_write.c:749 [inline]"
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CVE-2025-38470 (GCVE-0-2025-38470)

Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2026-08-05 12:02

Title

net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime

Summary

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime Assuming the "rx-vlan-filter" feature is enabled on a net device, the 8021q module will automatically add or remove VLAN 0 when the net device is put administratively up or down, respectively. There are a couple of problems with the above scheme. The first problem is a memory leak that can happen if the "rx-vlan-filter" feature is disabled while the device is running: # ip link add bond1 up type bond mode 0 # ethtool -K bond1 rx-vlan-filter off # ip link del dev bond1 When the device is put administratively down the "rx-vlan-filter" feature is disabled, so the 8021q module will not remove VLAN 0 and the memory will be leaked [1]. Another problem that can happen is that the kernel can automatically delete VLAN 0 when the device is put administratively down despite not adding it when the device was put administratively up since during that time the "rx-vlan-filter" feature was disabled. null-ptr-unref or bug_on[2] will be triggered by unregister_vlan_dev() for refcount imbalance if toggling filtering during runtime: $ ip link add bond0 type bond mode 0 $ ip link add link bond0 name vlan0 type vlan id 0 protocol 802.1q $ ethtool -K bond0 rx-vlan-filter off $ ifconfig bond0 up $ ethtool -K bond0 rx-vlan-filter on $ ifconfig bond0 down $ ip link del vlan0 Root cause is as below: step1: add vlan0 for real_dev, such as bond, team. register_vlan_dev vlan_vid_add(real_dev,htons(ETH_P_8021Q),0) //refcnt=1 step2: disable vlan filter feature and enable real_dev step3: change filter from 0 to 1 vlan_device_event vlan_filter_push_vids ndo_vlan_rx_add_vid //No refcnt added to real_dev vlan0 step4: real_dev down vlan_device_event vlan_vid_del(dev, htons(ETH_P_8021Q), 0); //refcnt=0 vlan_info_rcu_free //free vlan0 step5: delete vlan0 unregister_vlan_dev BUG_ON(!vlan_info); //vlan_info is null Fix both problems by noting in the VLAN info whether VLAN 0 was automatically added upon NETDEV_UP and based on that decide whether it should be deleted upon NETDEV_DOWN, regardless of the state of the "rx-vlan-filter" feature. [1] unreferenced object 0xffff8880068e3100 (size 256): comm "ip", pid 384, jiffies 4296130254 hex dump (first 32 bytes): 00 20 30 0d 80 88 ff ff 00 00 00 00 00 00 00 00 . 0............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 81ce31fa): __kmalloc_cache_noprof+0x2b5/0x340 vlan_vid_add+0x434/0x940 vlan_device_event.cold+0x75/0xa8 notifier_call_chain+0xca/0x150 __dev_notify_flags+0xe3/0x250 rtnl_configure_link+0x193/0x260 rtnl_newlink_create+0x383/0x8e0 __rtnl_newlink+0x22c/0xa40 rtnl_newlink+0x627/0xb00 rtnetlink_rcv_msg+0x6fb/0xb70 netlink_rcv_skb+0x11f/0x350 netlink_unicast+0x426/0x710 netlink_sendmsg+0x75a/0xc20 __sock_sendmsg+0xc1/0x150 ____sys_sendmsg+0x5aa/0x7b0 ___sys_sendmsg+0xfc/0x180 [2] kernel BUG at net/8021q/vlan.c:99! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 382 Comm: ip Not tainted 6.16.0-rc3 #61 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 RIP: 0010:unregister_vlan_dev (net/8021q/vlan.c:99 (discriminator 1)) RSP: 0018:ffff88810badf310 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88810da84000 RCX: ffffffffb47ceb9a RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88810e8b43c8 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff6cefe80 R10: ffffffffb677f407 R11: ffff88810badf3c0 R12: ffff88810e8b4000 R13: 0000000000000000 R14: ffff88810642a5c0 R15: 000000000000017e FS: 00007f1ff68c20c0(0000) GS:ffff888163a24000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ff5dad240 CR3: 0000000107e56000 CR4: 00000000000006f0 Call Trace: <TASK ---truncated---

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

11 references

URL	Tags
https://git.kernel.org/stable/c/ba48d3993af23753e…
https://git.kernel.org/stable/c/35142b3816832889e…
https://git.kernel.org/stable/c/047b61a24d7c866c5…
https://git.kernel.org/stable/c/d43ef15bf4856c8c4…
https://git.kernel.org/stable/c/bb515c41306454937…
https://git.kernel.org/stable/c/8984bcbd1edf5bee5…
https://git.kernel.org/stable/c/93715aa2d80e6c5ce…
https://git.kernel.org/stable/c/579d4f9ca9a9a6051…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

5 products

Vendor	Product	Version
Linux	Linux	Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < ba48d3993af23753e1f1f01c8d592de9c7785f24 (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < 35142b3816832889e50164d993018ea5810955ae (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < 047b61a24d7c866c502aeeea482892969a68f216 (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < d43ef15bf4856c8c4c6c3572922331a5f06deb77 (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < bb515c41306454937464da055609b5fb0a27821b (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < 8984bcbd1edf5bee5be06ad771d157333b790c33 (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < 93715aa2d80e6c5cea1bb486321fc4585076928b (git) Affected: ad1afb00393915a51c21b1ae8704562bf036855f , < 579d4f9ca9a9a605184a9b162355f6ba131f678d (git)
Linux	Linux	Affected: 2.6.36 Unaffected: 0 , < 2.6.36 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.147 , ≤ 6.1.* (semver) Unaffected: 6.6.100 , ≤ 6.6.* (semver) Unaffected: 6.12.40 , ≤ 6.12.* (semver) Unaffected: 6.15.8 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)

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JSON

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{
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          "dateUpdated": "2025-11-03T17:38:35.299Z",
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                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.5",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-14T12:42:08.952Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/8021q/vlan.c",
            "net/8021q/vlan.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ba48d3993af23753e1f1f01c8d592de9c7785f24",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "35142b3816832889e50164d993018ea5810955ae",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "047b61a24d7c866c502aeeea482892969a68f216",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "d43ef15bf4856c8c4c6c3572922331a5f06deb77",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "bb515c41306454937464da055609b5fb0a27821b",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "8984bcbd1edf5bee5be06ad771d157333b790c33",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "93715aa2d80e6c5cea1bb486321fc4585076928b",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            },
            {
              "lessThan": "579d4f9ca9a9a605184a9b162355f6ba131f678d",
              "status": "affected",
              "version": "ad1afb00393915a51c21b1ae8704562bf036855f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/8021q/vlan.c",
            "net/8021q/vlan.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.36"
            },
            {
              "lessThan": "2.6.36",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.147",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.100",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.297",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.190",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.147",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.100",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.40",
                  "versionStartIncluding": "2.6.36",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.8",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime\n\nAssuming the \"rx-vlan-filter\" feature is enabled on a net device, the\n8021q module will automatically add or remove VLAN 0 when the net device\nis put administratively up or down, respectively. There are a couple of\nproblems with the above scheme.\n\nThe first problem is a memory leak that can happen if the \"rx-vlan-filter\"\nfeature is disabled while the device is running:\n\n # ip link add bond1 up type bond mode 0\n # ethtool -K bond1 rx-vlan-filter off\n # ip link del dev bond1\n\nWhen the device is put administratively down the \"rx-vlan-filter\"\nfeature is disabled, so the 8021q module will not remove VLAN 0 and the\nmemory will be leaked [1].\n\nAnother problem that can happen is that the kernel can automatically\ndelete VLAN 0 when the device is put administratively down despite not\nadding it when the device was put administratively up since during that\ntime the \"rx-vlan-filter\" feature was disabled. null-ptr-unref or\nbug_on[2] will be triggered by unregister_vlan_dev() for refcount\nimbalance if toggling filtering during runtime:\n\n$ ip link add bond0 type bond mode 0\n$ ip link add link bond0 name vlan0 type vlan id 0 protocol 802.1q\n$ ethtool -K bond0 rx-vlan-filter off\n$ ifconfig bond0 up\n$ ethtool -K bond0 rx-vlan-filter on\n$ ifconfig bond0 down\n$ ip link del vlan0\n\nRoot cause is as below:\nstep1: add vlan0 for real_dev, such as bond, team.\nregister_vlan_dev\n    vlan_vid_add(real_dev,htons(ETH_P_8021Q),0) //refcnt=1\nstep2: disable vlan filter feature and enable real_dev\nstep3: change filter from 0 to 1\nvlan_device_event\n    vlan_filter_push_vids\n        ndo_vlan_rx_add_vid //No refcnt added to real_dev vlan0\nstep4: real_dev down\nvlan_device_event\n    vlan_vid_del(dev, htons(ETH_P_8021Q), 0); //refcnt=0\n        vlan_info_rcu_free //free vlan0\nstep5: delete vlan0\nunregister_vlan_dev\n    BUG_ON(!vlan_info); //vlan_info is null\n\nFix both problems by noting in the VLAN info whether VLAN 0 was\nautomatically added upon NETDEV_UP and based on that decide whether it\nshould be deleted upon NETDEV_DOWN, regardless of the state of the\n\"rx-vlan-filter\" feature.\n\n[1]\nunreferenced object 0xffff8880068e3100 (size 256):\n  comm \"ip\", pid 384, jiffies 4296130254\n  hex dump (first 32 bytes):\n    00 20 30 0d 80 88 ff ff 00 00 00 00 00 00 00 00  . 0.............\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace (crc 81ce31fa):\n    __kmalloc_cache_noprof+0x2b5/0x340\n    vlan_vid_add+0x434/0x940\n    vlan_device_event.cold+0x75/0xa8\n    notifier_call_chain+0xca/0x150\n    __dev_notify_flags+0xe3/0x250\n    rtnl_configure_link+0x193/0x260\n    rtnl_newlink_create+0x383/0x8e0\n    __rtnl_newlink+0x22c/0xa40\n    rtnl_newlink+0x627/0xb00\n    rtnetlink_rcv_msg+0x6fb/0xb70\n    netlink_rcv_skb+0x11f/0x350\n    netlink_unicast+0x426/0x710\n    netlink_sendmsg+0x75a/0xc20\n    __sock_sendmsg+0xc1/0x150\n    ____sys_sendmsg+0x5aa/0x7b0\n    ___sys_sendmsg+0xfc/0x180\n\n[2]\nkernel BUG at net/8021q/vlan.c:99!\nOops: invalid opcode: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 382 Comm: ip Not tainted 6.16.0-rc3 #61 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996),\nBIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\nRIP: 0010:unregister_vlan_dev (net/8021q/vlan.c:99 (discriminator 1))\nRSP: 0018:ffff88810badf310 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff88810da84000 RCX: ffffffffb47ceb9a\nRDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88810e8b43c8\nRBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff6cefe80\nR10: ffffffffb677f407 R11: ffff88810badf3c0 R12: ffff88810e8b4000\nR13: 0000000000000000 R14: ffff88810642a5c0 R15: 000000000000017e\nFS:  00007f1ff68c20c0(0000) GS:ffff888163a24000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f1ff5dad240 CR3: 0000000107e56000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is triggered exclusively through local configuration interfaces \u2014 RTM_NEWLINK/RTM_DELLINK/link up-down over rtnetlink plus ETHTOOL_SFEATURES via the ethtool ioctl/netlink path. No remote packet processing is involved.\nAC:L - The refcount imbalance is produced by a fixed, deterministic sequence of configuration commands (create VLAN 0, disable rx-vlan-filter, bring device up, re-enable filter, bring device down, delete VLAN), with no race to win and no dependence on memory layout the attacker cannot influence.\nPR:L - Both gates are namespace-relative \u2014 rtnetlink uses netlink_net_capable(skb, CAP_NET_ADMIN) and dev_ethtool() uses ns_capable(net-\u003euser_ns, CAP_NET_ADMIN) \u2014 so an unprivileged user obtains them via `unshare -Urn`, and bonding/team devices with a toggleable NETIF_F_HW_VLAN_CTAG_FILTER can be created entirely inside that namespace.\nUI:N - The attacker performs every step of the sequence themselves within their own network namespace; no victim action or cooperation is required.\nS:U - The corruption and its consequences are confined to the kernel\u0027s own memory and networking state, with no crossing into a different security authority such as a hypervisor or IOMMU boundary.\nC:H - The premature free of vlan_info leaves an orphaned GARP/MRP applicant whose periodic timer reads a freed struct net_device (mtu, needed_headroom) to size and populate skbs that are then transmitted, disclosing reclaimed kernel heap contents; per kernel scoring practice a use-after-free is scored High.\nI:H - The leaked applicant timer drives dev_queue_xmit() on a freed net_device, dereferencing netdev_ops function pointers from memory the attacker can heap-spray into during the ~250 ms timer window, yielding control-flow hijack potential; the unchecked NULL-array write in vlan_group_set_device() and the nr_vlan_devs underflow further corrupt kernel state.\nA:H - The primary reported outcome is `kernel BUG at net/8021q/vlan.c:99` (invalid opcode oops) or a NULL-pointer dereference, with the faulting task dying while holding RTNL and thereby wedging all subsequent network configuration; the variant also leaks vlan_info and netdev references, causing a permanent \"waiting for \u003cdev\u003e to become free\" unregister hang."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:02:09.041Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ba48d3993af23753e1f1f01c8d592de9c7785f24"
        },
        {
          "url": "https://git.kernel.org/stable/c/35142b3816832889e50164d993018ea5810955ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/047b61a24d7c866c502aeeea482892969a68f216"
        },
        {
          "url": "https://git.kernel.org/stable/c/d43ef15bf4856c8c4c6c3572922331a5f06deb77"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb515c41306454937464da055609b5fb0a27821b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8984bcbd1edf5bee5be06ad771d157333b790c33"
        },
        {
          "url": "https://git.kernel.org/stable/c/93715aa2d80e6c5cea1bb486321fc4585076928b"
        },
        {
          "url": "https://git.kernel.org/stable/c/579d4f9ca9a9a605184a9b162355f6ba131f678d"
        }
      ],
      "title": "net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38470",
    "datePublished": "2025-07-28T11:21:32.002Z",
    "dateReserved": "2025-04-16T04:51:24.020Z",
    "dateUpdated": "2026-08-05T12:02:09.041Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

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Tags

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