CVE-2025-40280 (GCVE-0-2025-40280)
Vulnerability from cvelistv5 – Published: 2025-12-06 21:51 – Updated: 2026-08-05 12:09
VLAI
EPSS
VEX
Title
tipc: Fix use-after-free in tipc_mon_reinit_self().
Summary
In the Linux kernel, the following vulnerability has been resolved:
tipc: Fix use-after-free in tipc_mon_reinit_self().
syzbot reported use-after-free of tipc_net(net)->monitors[]
in tipc_mon_reinit_self(). [0]
The array is protected by RTNL, but tipc_mon_reinit_self()
iterates over it without RTNL.
tipc_mon_reinit_self() is called from tipc_net_finalize(),
which is always under RTNL except for tipc_net_finalize_work().
Let's hold RTNL in tipc_net_finalize_work().
[0]:
BUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
Read of size 1 at addr ffff88805eae1030 by task kworker/0:7/5989
CPU: 0 UID: 0 PID: 5989 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events tipc_net_finalize_work
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
__kasan_check_byte+0x2a/0x40 mm/kasan/common.c:568
kasan_check_byte include/linux/kasan.h:399 [inline]
lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]
rwbase_rtmutex_lock_state kernel/locking/spinlock_rt.c:160 [inline]
rwbase_write_lock+0xd3/0x7e0 kernel/locking/rwbase_rt.c:244
rt_write_lock+0x76/0x110 kernel/locking/spinlock_rt.c:243
write_lock_bh include/linux/rwlock_rt.h:99 [inline]
tipc_mon_reinit_self+0x79/0x430 net/tipc/monitor.c:718
tipc_net_finalize+0x115/0x190 net/tipc/net.c:140
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 6089:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x1a8/0x320 mm/slub.c:4407
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
tipc_mon_create+0xc3/0x4d0 net/tipc/monitor.c:657
tipc_enable_bearer net/tipc/bearer.c:357 [inline]
__tipc_nl_bearer_enable+0xe16/0x13f0 net/tipc/bearer.c:1047
__tipc_nl_compat_doit net/tipc/netlink_compat.c:371 [inline]
tipc_nl_compat_doit+0x3bc/0x5f0 net/tipc/netlink_compat.c:393
tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline]
tipc_nl_compat_recv+0x83c/0xbe0 net/tipc/netlink_compat.c:1321
genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:729
____sys_sendmsg+0x508/0x820 net/socket.c:2614
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
__sys_sendmsg net/socket.c:2700 [inline]
__do_sys_sendmsg net/socket.c:2705 [inline]
__se_sys_sendmsg net/socket.c:2703 [inline]
__x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2703
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/
---truncated---
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 19:38 UTC
Assigner
References
9 references
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
28845c28f842e9e55e75b2c116bff714bb039055 , < 5f541300b02ef8b2af34f6f7d41ce617f3571e88
(git)
Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < b2e77c789c234e7fe49057d2ced8f32e2d2c7901 (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < 51b8f0ab888f8aa5dfac954918864eeda8c12c19 (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < 499b5fa78d525c4450ebb76db83207db71efea77 (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < c92dbf85627b5c29e52d9c120a24e785801716df (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < f0104977fed25ebe001fd63dab2b6b7fefad3373 (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < fdf7c4c9af4f246323ce854e84b6aec198d49f7e (git) Affected: 46cb01eeeb86fca6afe24dda1167b0cb95424e29 , < 0725e6afb55128be21a2ca36e9674f573ccec173 (git) Affected: 295c9b554f6dfcd2d368fae6e6fa22ee5b79c123 (git) Affected: 5.4.15 , < 5.4.302 (semver) Affected: 4.19.99 , < 4.20 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.4.302 , ≤ 5.4.* (semver) Unaffected: 5.10.247 , ≤ 5.10.* (semver) Unaffected: 5.15.197 , ≤ 5.15.* (semver) Unaffected: 6.1.159 , ≤ 6.1.* (semver) Unaffected: 6.6.117 , ≤ 6.6.* (semver) Unaffected: 6.12.59 , ≤ 6.12.* (semver) Unaffected: 6.17.9 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V4.0
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"affected": [
{
"defaultStatus": "unknown",
"product": "RUGGEDCOM RST2428P",
"vendor": "Siemens",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-253495.html"
}
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"x_adpType": "supplier"
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{
"metrics": [
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"other": {
"content": {
"id": "CVE-2025-40280",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-16T19:38:24.070026Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-16T19:38:34.983Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/tipc/net.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"versionType": "git"
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{
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"versionType": "git"
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{
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"versionType": "git"
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},
{
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]
},
{
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"programFiles": [
"net/tipc/net.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "5.4.302",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.247",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "5.15.197",
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},
{
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"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.117",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.59",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.302",
"versionStartIncluding": "5.4.15",
"vulnerable": true
},
{
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{
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},
{
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}
],
"negate": false,
"operator": "OR"
}
]
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: Fix use-after-free in tipc_mon_reinit_self().\n\nsyzbot reported use-after-free of tipc_net(net)-\u003emonitors[]\nin tipc_mon_reinit_self(). [0]\n\nThe array is protected by RTNL, but tipc_mon_reinit_self()\niterates over it without RTNL.\n\ntipc_mon_reinit_self() is called from tipc_net_finalize(),\nwhich is always under RTNL except for tipc_net_finalize_work().\n\nLet\u0027s hold RTNL in tipc_net_finalize_work().\n\n[0]:\nBUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\nBUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\nRead of size 1 at addr ffff88805eae1030 by task kworker/0:7/5989\n\nCPU: 0 UID: 0 PID: 5989 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT_{RT,(full)}\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\nWorkqueue: events tipc_net_finalize_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xca/0x240 mm/kasan/report.c:482\n kasan_report+0x118/0x150 mm/kasan/report.c:595\n __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:568\n kasan_check_byte include/linux/kasan.h:399 [inline]\n lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\n _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\n rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]\n rwbase_rtmutex_lock_state kernel/locking/spinlock_rt.c:160 [inline]\n rwbase_write_lock+0xd3/0x7e0 kernel/locking/rwbase_rt.c:244\n rt_write_lock+0x76/0x110 kernel/locking/spinlock_rt.c:243\n write_lock_bh include/linux/rwlock_rt.h:99 [inline]\n tipc_mon_reinit_self+0x79/0x430 net/tipc/monitor.c:718\n tipc_net_finalize+0x115/0x190 net/tipc/net.c:140\n process_one_work kernel/workqueue.c:3236 [inline]\n process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319\n worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400\n kthread+0x70e/0x8a0 kernel/kthread.c:463\n ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n \u003c/TASK\u003e\n\nAllocated by task 6089:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3e/0x80 mm/kasan/common.c:68\n poison_kmalloc_redzone mm/kasan/common.c:388 [inline]\n __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405\n kasan_kmalloc include/linux/kasan.h:260 [inline]\n __kmalloc_cache_noprof+0x1a8/0x320 mm/slub.c:4407\n kmalloc_noprof include/linux/slab.h:905 [inline]\n kzalloc_noprof include/linux/slab.h:1039 [inline]\n tipc_mon_create+0xc3/0x4d0 net/tipc/monitor.c:657\n tipc_enable_bearer net/tipc/bearer.c:357 [inline]\n __tipc_nl_bearer_enable+0xe16/0x13f0 net/tipc/bearer.c:1047\n __tipc_nl_compat_doit net/tipc/netlink_compat.c:371 [inline]\n tipc_nl_compat_doit+0x3bc/0x5f0 net/tipc/netlink_compat.c:393\n tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline]\n tipc_nl_compat_recv+0x83c/0xbe0 net/tipc/netlink_compat.c:1321\n genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\n genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210\n netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346\n netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896\n sock_sendmsg_nosec net/socket.c:714 [inline]\n __sock_sendmsg+0x21c/0x270 net/socket.c:729\n ____sys_sendmsg+0x508/0x820 net/socket.c:2614\n ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668\n __sys_sendmsg net/socket.c:2700 [inline]\n __do_sys_sendmsg net/socket.c:2705 [inline]\n __se_sys_sendmsg net/socket.c:2703 [inline]\n __x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2703\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/\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 UAF race is driven by local netlink/configuration operations \u2014 enabling a TIPC bearer and tearing it down (netdev unregister) \u2014 with the finalize work self-scheduled by the address-trial timeout; the freeing side cannot be driven by a remote peer, so local access is required.\nAC:L - The attacker controls both sides of the race (bearer enable/finalize work vs. concurrent bearer disable/monitor free) and can repeat the operations to win the window, as demonstrated by the syzbot reproducer.\nPR:L - All TIPC bearer operations require GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN), which is obtainable by an unprivileged user in a user+network namespace (unshare -Urn) since TIPC is netns-aware.\nUI:N - The race is triggered entirely by the attacker\u0027s own syscalls and a kernel timer/workqueue; no action from any other user is needed.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; standard kernel privilege escalation does not cross a CVSS scope boundary.\nC:H - A use-after-free lets the attacker reallocate the freed monitor object with controlled contents, and the code reads pointers/fields from it, enabling disclosure of kernel memory.\nI:H - The UAF dereferences `mon-\u003eself` from the freed object and writes a controlled node address (`mon-\u003eself-\u003eaddr = ...`); with heap grooming this yields an arbitrary-write primitive exploitable for control-flow hijack.\nA:H - The use-after-free reliably causes kernel memory corruption and oops/panic, taking down the system."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:09:10.959Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5f541300b02ef8b2af34f6f7d41ce617f3571e88"
},
{
"url": "https://git.kernel.org/stable/c/b2e77c789c234e7fe49057d2ced8f32e2d2c7901"
},
{
"url": "https://git.kernel.org/stable/c/51b8f0ab888f8aa5dfac954918864eeda8c12c19"
},
{
"url": "https://git.kernel.org/stable/c/499b5fa78d525c4450ebb76db83207db71efea77"
},
{
"url": "https://git.kernel.org/stable/c/c92dbf85627b5c29e52d9c120a24e785801716df"
},
{
"url": "https://git.kernel.org/stable/c/f0104977fed25ebe001fd63dab2b6b7fefad3373"
},
{
"url": "https://git.kernel.org/stable/c/fdf7c4c9af4f246323ce854e84b6aec198d49f7e"
},
{
"url": "https://git.kernel.org/stable/c/0725e6afb55128be21a2ca36e9674f573ccec173"
}
],
"title": "tipc: Fix use-after-free in tipc_mon_reinit_self().",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2025-40280",
"datePublished": "2025-12-06T21:51:04.091Z",
"dateReserved": "2025-04-16T07:20:57.184Z",
"dateUpdated": "2026-08-05T12:09:10.959Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-40280",
"date": "2026-09-15",
"epss": "0.00146",
"percentile": "0.04227"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40280\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-06T22:15:55.973\",\"lastModified\":\"2026-07-30T06:24:25.963\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: Fix use-after-free in tipc_mon_reinit_self().\\n\\nsyzbot reported use-after-free of tipc_net(net)-\u003emonitors[]\\nin tipc_mon_reinit_self(). [0]\\n\\nThe array is protected by RTNL, but tipc_mon_reinit_self()\\niterates over it without RTNL.\\n\\ntipc_mon_reinit_self() is called from tipc_net_finalize(),\\nwhich is always under RTNL except for tipc_net_finalize_work().\\n\\nLet\u0027s hold RTNL in tipc_net_finalize_work().\\n\\n[0]:\\nBUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\\nBUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\\nRead of size 1 at addr ffff88805eae1030 by task kworker/0:7/5989\\n\\nCPU: 0 UID: 0 PID: 5989 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT_{RT,(full)}\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\\nWorkqueue: events tipc_net_finalize_work\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0xca/0x240 mm/kasan/report.c:482\\n kasan_report+0x118/0x150 mm/kasan/report.c:595\\n __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:568\\n kasan_check_byte include/linux/kasan.h:399 [inline]\\n lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842\\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\\n _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\\n rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]\\n rwbase_rtmutex_lock_state kernel/locking/spinlock_rt.c:160 [inline]\\n rwbase_write_lock+0xd3/0x7e0 kernel/locking/rwbase_rt.c:244\\n rt_write_lock+0x76/0x110 kernel/locking/spinlock_rt.c:243\\n write_lock_bh include/linux/rwlock_rt.h:99 [inline]\\n tipc_mon_reinit_self+0x79/0x430 net/tipc/monitor.c:718\\n tipc_net_finalize+0x115/0x190 net/tipc/net.c:140\\n process_one_work kernel/workqueue.c:3236 [inline]\\n process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319\\n worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400\\n kthread+0x70e/0x8a0 kernel/kthread.c:463\\n ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148\\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\\n \u003c/TASK\u003e\\n\\nAllocated by task 6089:\\n kasan_save_stack mm/kasan/common.c:47 [inline]\\n kasan_save_track+0x3e/0x80 mm/kasan/common.c:68\\n poison_kmalloc_redzone mm/kasan/common.c:388 [inline]\\n __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405\\n kasan_kmalloc include/linux/kasan.h:260 [inline]\\n __kmalloc_cache_noprof+0x1a8/0x320 mm/slub.c:4407\\n kmalloc_noprof include/linux/slab.h:905 [inline]\\n kzalloc_noprof include/linux/slab.h:1039 [inline]\\n tipc_mon_create+0xc3/0x4d0 net/tipc/monitor.c:657\\n tipc_enable_bearer net/tipc/bearer.c:357 [inline]\\n __tipc_nl_bearer_enable+0xe16/0x13f0 net/tipc/bearer.c:1047\\n __tipc_nl_compat_doit net/tipc/netlink_compat.c:371 [inline]\\n tipc_nl_compat_doit+0x3bc/0x5f0 net/tipc/netlink_compat.c:393\\n tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline]\\n tipc_nl_compat_recv+0x83c/0xbe0 net/tipc/netlink_compat.c:1321\\n genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115\\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\\n genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210\\n netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552\\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\\n netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346\\n netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896\\n sock_sendmsg_nosec net/socket.c:714 [inline]\\n __sock_sendmsg+0x21c/0x270 net/socket.c:729\\n ____sys_sendmsg+0x508/0x820 net/socket.c:2614\\n ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668\\n __sys_sendmsg net/socket.c:2700 [inline]\\n __do_sys_sendmsg net/socket.c:2705 [inline]\\n __se_sys_sendmsg net/socket.c:2703 [inline]\\n __x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2703\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xfa/0x3b0 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-30T08:37:59+00:00",
"cve": "CVE-2025-40280",
"id": "CVE-2025-40280",
"initial_release_date": "2025-12-06T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: tipc: Fix use-after-free in tipc_mon_reinit_self()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40280.json",
"version": "3"
},
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"current_release_date": "2026-09-11T01:54:09Z",
"cve": "CVE-2025-40280",
"id": "CVE-2025-40280",
"initial_release_date": "2025-12-08T00:23:07Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "467",
"product_status:known_not_affected": "187",
"product_status:recommended": "584",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-40280",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40280.json",
"version": "49"
},
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the freeing side cannot be driven by a remote peer, so local access is required.\\nAC:L - The attacker controls both sides of the race (bearer enable/finalize work vs. concurrent bearer disable/monitor free) and can repeat the operations to win the window, as demonstrated by the syzbot reproducer.\\nPR:L - All TIPC bearer operations require GENL_UNS_ADMIN_PERM (CAP_NET_ADMIN), which is obtainable by an unprivileged user in a user+network namespace (unshare -Urn) since TIPC is netns-aware.\\nUI:N - The race is triggered entirely by the attacker\u0027s own syscalls and a kernel timer/workqueue; no action from any other user is needed.\\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; standard kernel privilege escalation does not cross a CVSS scope boundary.\\nC:H - A use-after-free lets the attacker reallocate the freed monitor object with controlled contents, and the code reads pointers/fields from it, enabling disclosure of kernel memory.\\nI:H - The UAF dereferences `mon-\u003eself` from the freed object and writes a controlled node address (`mon-\u003eself-\u003eaddr = ...`); with heap grooming this yields an arbitrary-write primitive exploitable for control-flow hijack.\\nA:H - The use-after-free reliably causes kernel memory corruption and oops/panic, taking down the system.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"28845c28f842e9e55e75b2c116bff714bb039055\", \"lessThan\": \"5f541300b02ef8b2af34f6f7d41ce617f3571e88\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"b2e77c789c234e7fe49057d2ced8f32e2d2c7901\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"51b8f0ab888f8aa5dfac954918864eeda8c12c19\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"499b5fa78d525c4450ebb76db83207db71efea77\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"c92dbf85627b5c29e52d9c120a24e785801716df\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"f0104977fed25ebe001fd63dab2b6b7fefad3373\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"fdf7c4c9af4f246323ce854e84b6aec198d49f7e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46cb01eeeb86fca6afe24dda1167b0cb95424e29\", \"lessThan\": \"0725e6afb55128be21a2ca36e9674f573ccec173\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"295c9b554f6dfcd2d368fae6e6fa22ee5b79c123\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5.4.15\", \"lessThan\": \"5.4.302\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.99\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/tipc/net.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.302\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.247\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.197\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.117\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.59\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/tipc/net.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5f541300b02ef8b2af34f6f7d41ce617f3571e88\"}, {\"url\": \"https://git.kernel.org/stable/c/b2e77c789c234e7fe49057d2ced8f32e2d2c7901\"}, {\"url\": \"https://git.kernel.org/stable/c/51b8f0ab888f8aa5dfac954918864eeda8c12c19\"}, {\"url\": \"https://git.kernel.org/stable/c/499b5fa78d525c4450ebb76db83207db71efea77\"}, {\"url\": \"https://git.kernel.org/stable/c/c92dbf85627b5c29e52d9c120a24e785801716df\"}, {\"url\": \"https://git.kernel.org/stable/c/f0104977fed25ebe001fd63dab2b6b7fefad3373\"}, {\"url\": \"https://git.kernel.org/stable/c/fdf7c4c9af4f246323ce854e84b6aec198d49f7e\"}, {\"url\": \"https://git.kernel.org/stable/c/0725e6afb55128be21a2ca36e9674f573ccec173\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntipc: Fix use-after-free in tipc_mon_reinit_self().\\n\\nsyzbot reported use-after-free of tipc_net(net)-\u003emonitors[]\\nin tipc_mon_reinit_self(). [0]\\n\\nThe array is protected by RTNL, but tipc_mon_reinit_self()\\niterates over it without RTNL.\\n\\ntipc_mon_reinit_self() is called from tipc_net_finalize(),\\nwhich is always under RTNL except for tipc_net_finalize_work().\\n\\nLet\u0027s hold RTNL in tipc_net_finalize_work().\\n\\n[0]:\\nBUG: KASAN: slab-use-after-free in __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\\nBUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\\nRead of size 1 at addr ffff88805eae1030 by task kworker/0:7/5989\\n\\nCPU: 0 UID: 0 PID: 5989 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT_{RT,(full)}\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\\nWorkqueue: events tipc_net_finalize_work\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\\n print_address_description mm/kasan/report.c:378 [inline]\\n print_report+0xca/0x240 mm/kasan/report.c:482\\n kasan_report+0x118/0x150 mm/kasan/report.c:595\\n __kasan_check_byte+0x2a/0x40 mm/kasan/common.c:568\\n kasan_check_byte include/linux/kasan.h:399 [inline]\\n lock_acquire+0x8d/0x360 kernel/locking/lockdep.c:5842\\n __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]\\n _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162\\n rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]\\n rwbase_rtmutex_lock_state kernel/locking/spinlock_rt.c:160 [inline]\\n rwbase_write_lock+0xd3/0x7e0 kernel/locking/rwbase_rt.c:244\\n rt_write_lock+0x76/0x110 kernel/locking/spinlock_rt.c:243\\n write_lock_bh include/linux/rwlock_rt.h:99 [inline]\\n tipc_mon_reinit_self+0x79/0x430 net/tipc/monitor.c:718\\n tipc_net_finalize+0x115/0x190 net/tipc/net.c:140\\n process_one_work kernel/workqueue.c:3236 [inline]\\n process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319\\n worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400\\n kthread+0x70e/0x8a0 kernel/kthread.c:463\\n ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148\\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\\n \u003c/TASK\u003e\\n\\nAllocated by task 6089:\\n kasan_save_stack mm/kasan/common.c:47 [inline]\\n kasan_save_track+0x3e/0x80 mm/kasan/common.c:68\\n poison_kmalloc_redzone mm/kasan/common.c:388 [inline]\\n __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:405\\n kasan_kmalloc include/linux/kasan.h:260 [inline]\\n __kmalloc_cache_noprof+0x1a8/0x320 mm/slub.c:4407\\n kmalloc_noprof include/linux/slab.h:905 [inline]\\n kzalloc_noprof include/linux/slab.h:1039 [inline]\\n tipc_mon_create+0xc3/0x4d0 net/tipc/monitor.c:657\\n tipc_enable_bearer net/tipc/bearer.c:357 [inline]\\n __tipc_nl_bearer_enable+0xe16/0x13f0 net/tipc/bearer.c:1047\\n __tipc_nl_compat_doit net/tipc/netlink_compat.c:371 [inline]\\n tipc_nl_compat_doit+0x3bc/0x5f0 net/tipc/netlink_compat.c:393\\n tipc_nl_compat_handle net/tipc/netlink_compat.c:-1 [inline]\\n tipc_nl_compat_recv+0x83c/0xbe0 net/tipc/netlink_compat.c:1321\\n genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115\\n genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\\n genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210\\n netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552\\n genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219\\n netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\\n netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1346\\n netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896\\n sock_sendmsg_nosec net/socket.c:714 [inline]\\n __sock_sendmsg+0x21c/0x270 net/socket.c:729\\n ____sys_sendmsg+0x508/0x820 net/socket.c:2614\\n ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668\\n __sys_sendmsg net/socket.c:2700 [inline]\\n __do_sys_sendmsg net/socket.c:2705 [inline]\\n __se_sys_sendmsg net/socket.c:2703 [inline]\\n __x64_sys_sendmsg+0x1a1/0x260 net/socket.c:2703\\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\\n do_syscall_64+0xfa/0x3b0 arch/\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.302\", \"versionStartIncluding\": \"5.4.15\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.247\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.197\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.159\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.117\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.59\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.9\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.99\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:09:10.959Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-40280\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T12:09:10.959Z\", \"dateReserved\": \"2025-04-16T07:20:57.184Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-12-06T21:51:04.091Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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