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CVE-2025-23163 (GCVE-0-2025-23163)

Vulnerability from cvelistv5 – Published: 2025-05-01 12:55 – Updated: 2026-05-11 21:14
VLAI
Title
net: vlan: don't propagate flags on open
Summary
In the Linux kernel, the following vulnerability has been resolved: net: vlan: don't propagate flags on open With the device instance lock, there is now a possibility of a deadlock: [ 1.211455] ============================================ [ 1.211571] WARNING: possible recursive locking detected [ 1.211687] 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 Not tainted [ 1.211823] -------------------------------------------- [ 1.211936] ip/184 is trying to acquire lock: [ 1.212032] ffff8881024a4c30 (&dev->lock){+.+.}-{4:4}, at: dev_set_allmulti+0x4e/0xb0 [ 1.212207] [ 1.212207] but task is already holding lock: [ 1.212332] ffff8881024a4c30 (&dev->lock){+.+.}-{4:4}, at: dev_open+0x50/0xb0 [ 1.212487] [ 1.212487] other info that might help us debug this: [ 1.212626] Possible unsafe locking scenario: [ 1.212626] [ 1.212751] CPU0 [ 1.212815] ---- [ 1.212871] lock(&dev->lock); [ 1.212944] lock(&dev->lock); [ 1.213016] [ 1.213016] *** DEADLOCK *** [ 1.213016] [ 1.213143] May be due to missing lock nesting notation [ 1.213143] [ 1.213294] 3 locks held by ip/184: [ 1.213371] #0: ffffffff838b53e0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x1b/0xa0 [ 1.213543] #1: ffffffff84e5fc70 (&net->rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x37/0xa0 [ 1.213727] #2: ffff8881024a4c30 (&dev->lock){+.+.}-{4:4}, at: dev_open+0x50/0xb0 [ 1.213895] [ 1.213895] stack backtrace: [ 1.213991] CPU: 0 UID: 0 PID: 184 Comm: ip Not tainted 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 [ 1.213993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 [ 1.213994] Call Trace: [ 1.213995] <TASK> [ 1.213996] dump_stack_lvl+0x8e/0xd0 [ 1.214000] print_deadlock_bug+0x28b/0x2a0 [ 1.214020] lock_acquire+0xea/0x2a0 [ 1.214027] __mutex_lock+0xbf/0xd40 [ 1.214038] dev_set_allmulti+0x4e/0xb0 # real_dev->flags & IFF_ALLMULTI [ 1.214040] vlan_dev_open+0xa5/0x170 # ndo_open on vlandev [ 1.214042] __dev_open+0x145/0x270 [ 1.214046] __dev_change_flags+0xb0/0x1e0 [ 1.214051] netif_change_flags+0x22/0x60 # IFF_UP vlandev [ 1.214053] dev_change_flags+0x61/0xb0 # for each device in group from dev->vlan_info [ 1.214055] vlan_device_event+0x766/0x7c0 # on netdevsim0 [ 1.214058] notifier_call_chain+0x78/0x120 [ 1.214062] netif_open+0x6d/0x90 [ 1.214064] dev_open+0x5b/0xb0 # locks netdevsim0 [ 1.214066] bond_enslave+0x64c/0x1230 [ 1.214075] do_set_master+0x175/0x1e0 # on netdevsim0 [ 1.214077] do_setlink+0x516/0x13b0 [ 1.214094] rtnl_newlink+0xaba/0xb80 [ 1.214132] rtnetlink_rcv_msg+0x440/0x490 [ 1.214144] netlink_rcv_skb+0xeb/0x120 [ 1.214150] netlink_unicast+0x1f9/0x320 [ 1.214153] netlink_sendmsg+0x346/0x3f0 [ 1.214157] __sock_sendmsg+0x86/0xb0 [ 1.214160] ____sys_sendmsg+0x1c8/0x220 [ 1.214164] ___sys_sendmsg+0x28f/0x2d0 [ 1.214179] __x64_sys_sendmsg+0xef/0x140 [ 1.214184] do_syscall_64+0xec/0x1d0 [ 1.214190] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1.214191] RIP: 0033:0x7f2d1b4a7e56 Device setup: netdevsim0 (down) ^ ^ bond netdevsim1.100@netdevsim1 allmulticast=on (down) When we enslave the lower device (netdevsim0) which has a vlan, we propagate vlan's allmuti/promisc flags during ndo_open. This causes (re)locking on of the real_dev. Propagate allmulti/promisc on flags change, not on the open. There is a slight semantics change that vlans that are down now propagate the flags, but this seems unlikely to result in the real issues. Reproducer: echo 0 1 > /sys/bus/netdevsim/new_device dev_path=$(ls -d /sys/bus/netdevsim/devices/netdevsim0/net/*) dev=$(echo $dev_path | rev | cut -d/ -f1 | rev) ip link set dev $dev name netdevsim0 ip link set dev netdevsim0 up ip link add link netdevsim0 name netdevsim0.100 type vlan id 100 ip link set dev netdevsim0.100 allm ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < a32f1d4f1f4c9d978698f3c718621f6198f2e7ac (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < b1e3eeb037256a2f1206a8d69810ec47eb152026 (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 523fa0979d842443aa14b80002e45b471cbac137 (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 53fb25e90c0a503a17c639341ba5e755cb2feb5c (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < d537859e56bcc3091805c524484a4c85386b3cc8 (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 299d7d27af6b5844cda06a0fdfa635705e1bc50f (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 8980018a9806743d9b80837330d46f06ecf78516 (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 538b43aa21e3b17c110104efd218b966d2eda5f8 (git)
Affected: 6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde , < 27b918007d96402aba10ed52a6af8015230f1793 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.23
Unaffected: 0 , < 2.6.23 (semver)
Unaffected: 5.4.293 , ≤ 5.4.* (semver)
Unaffected: 5.10.237 , ≤ 5.10.* (semver)
Unaffected: 5.15.181 , ≤ 5.15.* (semver)
Unaffected: 6.1.135 , ≤ 6.1.* (semver)
Unaffected: 6.6.88 , ≤ 6.6.* (semver)
Unaffected: 6.12.24 , ≤ 6.12.* (semver)
Unaffected: 6.13.12 , ≤ 6.13.* (semver)
Unaffected: 6.14.3 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: vlan: don\u0027t propagate flags on open\n\nWith the device instance lock, there is now a possibility of a deadlock:\n\n[    1.211455] ============================================\n[    1.211571] WARNING: possible recursive locking detected\n[    1.211687] 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 Not tainted\n[    1.211823] --------------------------------------------\n[    1.211936] ip/184 is trying to acquire lock:\n[    1.212032] ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_set_allmulti+0x4e/0xb0\n[    1.212207]\n[    1.212207] but task is already holding lock:\n[    1.212332] ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_open+0x50/0xb0\n[    1.212487]\n[    1.212487] other info that might help us debug this:\n[    1.212626]  Possible unsafe locking scenario:\n[    1.212626]\n[    1.212751]        CPU0\n[    1.212815]        ----\n[    1.212871]   lock(\u0026dev-\u003elock);\n[    1.212944]   lock(\u0026dev-\u003elock);\n[    1.213016]\n[    1.213016]  *** DEADLOCK ***\n[    1.213016]\n[    1.213143]  May be due to missing lock nesting notation\n[    1.213143]\n[    1.213294] 3 locks held by ip/184:\n[    1.213371]  #0: ffffffff838b53e0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x1b/0xa0\n[    1.213543]  #1: ffffffff84e5fc70 (\u0026net-\u003ertnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x37/0xa0\n[    1.213727]  #2: ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_open+0x50/0xb0\n[    1.213895]\n[    1.213895] stack backtrace:\n[    1.213991] CPU: 0 UID: 0 PID: 184 Comm: ip Not tainted 6.14.0-rc5-01215-g032756b4ca7a-dirty #5\n[    1.213993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014\n[    1.213994] Call Trace:\n[    1.213995]  \u003cTASK\u003e\n[    1.213996]  dump_stack_lvl+0x8e/0xd0\n[    1.214000]  print_deadlock_bug+0x28b/0x2a0\n[    1.214020]  lock_acquire+0xea/0x2a0\n[    1.214027]  __mutex_lock+0xbf/0xd40\n[    1.214038]  dev_set_allmulti+0x4e/0xb0 # real_dev-\u003eflags \u0026 IFF_ALLMULTI\n[    1.214040]  vlan_dev_open+0xa5/0x170 # ndo_open on vlandev\n[    1.214042]  __dev_open+0x145/0x270\n[    1.214046]  __dev_change_flags+0xb0/0x1e0\n[    1.214051]  netif_change_flags+0x22/0x60 # IFF_UP vlandev\n[    1.214053]  dev_change_flags+0x61/0xb0 # for each device in group from dev-\u003evlan_info\n[    1.214055]  vlan_device_event+0x766/0x7c0 # on netdevsim0\n[    1.214058]  notifier_call_chain+0x78/0x120\n[    1.214062]  netif_open+0x6d/0x90\n[    1.214064]  dev_open+0x5b/0xb0 # locks netdevsim0\n[    1.214066]  bond_enslave+0x64c/0x1230\n[    1.214075]  do_set_master+0x175/0x1e0 # on netdevsim0\n[    1.214077]  do_setlink+0x516/0x13b0\n[    1.214094]  rtnl_newlink+0xaba/0xb80\n[    1.214132]  rtnetlink_rcv_msg+0x440/0x490\n[    1.214144]  netlink_rcv_skb+0xeb/0x120\n[    1.214150]  netlink_unicast+0x1f9/0x320\n[    1.214153]  netlink_sendmsg+0x346/0x3f0\n[    1.214157]  __sock_sendmsg+0x86/0xb0\n[    1.214160]  ____sys_sendmsg+0x1c8/0x220\n[    1.214164]  ___sys_sendmsg+0x28f/0x2d0\n[    1.214179]  __x64_sys_sendmsg+0xef/0x140\n[    1.214184]  do_syscall_64+0xec/0x1d0\n[    1.214190]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[    1.214191] RIP: 0033:0x7f2d1b4a7e56\n\nDevice setup:\n\n     netdevsim0 (down)\n     ^        ^\n  bond        netdevsim1.100@netdevsim1 allmulticast=on (down)\n\nWhen we enslave the lower device (netdevsim0) which has a vlan, we\npropagate vlan\u0027s allmuti/promisc flags during ndo_open. This causes\n(re)locking on of the real_dev.\n\nPropagate allmulti/promisc on flags change, not on the open. There\nis a slight semantics change that vlans that are down now propagate\nthe flags, but this seems unlikely to result in the real issues.\n\nReproducer:\n\n  echo 0 1 \u003e /sys/bus/netdevsim/new_device\n\n  dev_path=$(ls -d /sys/bus/netdevsim/devices/netdevsim0/net/*)\n  dev=$(echo $dev_path | rev | cut -d/ -f1 | rev)\n\n  ip link set dev $dev name netdevsim0\n  ip link set dev netdevsim0 up\n\n  ip link add link netdevsim0 name netdevsim0.100 type vlan id 100\n  ip link set dev netdevsim0.100 allm\n---truncated---"
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a32f1d4f1f4c9d978698f3c718621f6198f2e7ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1e3eeb037256a2f1206a8d69810ec47eb152026"
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        {
          "url": "https://git.kernel.org/stable/c/523fa0979d842443aa14b80002e45b471cbac137"
        },
        {
          "url": "https://git.kernel.org/stable/c/53fb25e90c0a503a17c639341ba5e755cb2feb5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d537859e56bcc3091805c524484a4c85386b3cc8"
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        },
        {
          "url": "https://git.kernel.org/stable/c/8980018a9806743d9b80837330d46f06ecf78516"
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      "title": "net: vlan: don\u0027t propagate flags on open",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-23163",
    "datePublished": "2025-05-01T12:55:47.380Z",
    "dateReserved": "2025-01-11T14:28:41.517Z",
    "dateUpdated": "2026-05-11T21:14:11.352Z",
    "state": "PUBLISHED"
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      "date": "2026-09-15",
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    "microsoft_vex": {
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      "cve": "CVE-2025-23163",
      "id": "msrc_CVE-2025-23163",
      "initial_release_date": "2025-05-02T00:00:00.000Z",
      "product_status:fixed": "2",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net: vlan: don\u0027t propagate flags on open",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-23163.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-23163\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T13:15:52.273\",\"lastModified\":\"2026-06-17T08:52:17.343\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: vlan: don\u0027t propagate flags on open\\n\\nWith the device instance lock, there is now a possibility of a deadlock:\\n\\n[    1.211455] ============================================\\n[    1.211571] WARNING: possible recursive locking detected\\n[    1.211687] 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 Not tainted\\n[    1.211823] --------------------------------------------\\n[    1.211936] ip/184 is trying to acquire lock:\\n[    1.212032] ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_set_allmulti+0x4e/0xb0\\n[    1.212207]\\n[    1.212207] but task is already holding lock:\\n[    1.212332] ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_open+0x50/0xb0\\n[    1.212487]\\n[    1.212487] other info that might help us debug this:\\n[    1.212626]  Possible unsafe locking scenario:\\n[    1.212626]\\n[    1.212751]        CPU0\\n[    1.212815]        ----\\n[    1.212871]   lock(\u0026dev-\u003elock);\\n[    1.212944]   lock(\u0026dev-\u003elock);\\n[    1.213016]\\n[    1.213016]  *** DEADLOCK ***\\n[    1.213016]\\n[    1.213143]  May be due to missing lock nesting notation\\n[    1.213143]\\n[    1.213294] 3 locks held by ip/184:\\n[    1.213371]  #0: ffffffff838b53e0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x1b/0xa0\\n[    1.213543]  #1: ffffffff84e5fc70 (\u0026net-\u003ertnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x37/0xa0\\n[    1.213727]  #2: ffff8881024a4c30 (\u0026dev-\u003elock){+.+.}-{4:4}, at: dev_open+0x50/0xb0\\n[    1.213895]\\n[    1.213895] stack backtrace:\\n[    1.213991] CPU: 0 UID: 0 PID: 184 Comm: ip Not tainted 6.14.0-rc5-01215-g032756b4ca7a-dirty #5\\n[    1.213993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014\\n[    1.213994] Call Trace:\\n[    1.213995]  \u003cTASK\u003e\\n[    1.213996]  dump_stack_lvl+0x8e/0xd0\\n[    1.214000]  print_deadlock_bug+0x28b/0x2a0\\n[    1.214020]  lock_acquire+0xea/0x2a0\\n[    1.214027]  __mutex_lock+0xbf/0xd40\\n[    1.214038]  dev_set_allmulti+0x4e/0xb0 # real_dev-\u003eflags \u0026 IFF_ALLMULTI\\n[    1.214040]  vlan_dev_open+0xa5/0x170 # ndo_open on vlandev\\n[    1.214042]  __dev_open+0x145/0x270\\n[    1.214046]  __dev_change_flags+0xb0/0x1e0\\n[    1.214051]  netif_change_flags+0x22/0x60 # IFF_UP vlandev\\n[    1.214053]  dev_change_flags+0x61/0xb0 # for each device in group from dev-\u003evlan_info\\n[    1.214055]  vlan_device_event+0x766/0x7c0 # on netdevsim0\\n[    1.214058]  notifier_call_chain+0x78/0x120\\n[    1.214062]  netif_open+0x6d/0x90\\n[    1.214064]  dev_open+0x5b/0xb0 # locks netdevsim0\\n[    1.214066]  bond_enslave+0x64c/0x1230\\n[    1.214075]  do_set_master+0x175/0x1e0 # on netdevsim0\\n[    1.214077]  do_setlink+0x516/0x13b0\\n[    1.214094]  rtnl_newlink+0xaba/0xb80\\n[    1.214132]  rtnetlink_rcv_msg+0x440/0x490\\n[    1.214144]  netlink_rcv_skb+0xeb/0x120\\n[    1.214150]  netlink_unicast+0x1f9/0x320\\n[    1.214153]  netlink_sendmsg+0x346/0x3f0\\n[    1.214157]  __sock_sendmsg+0x86/0xb0\\n[    1.214160]  ____sys_sendmsg+0x1c8/0x220\\n[    1.214164]  ___sys_sendmsg+0x28f/0x2d0\\n[    1.214179]  __x64_sys_sendmsg+0xef/0x140\\n[    1.214184]  do_syscall_64+0xec/0x1d0\\n[    1.214190]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n[    1.214191] RIP: 0033:0x7f2d1b4a7e56\\n\\nDevice setup:\\n\\n     netdevsim0 (down)\\n     ^        ^\\n  bond        netdevsim1.100@netdevsim1 allmulticast=on (down)\\n\\nWhen we enslave the lower device (netdevsim0) which has a vlan, we\\npropagate vlan\u0027s allmuti/promisc flags during ndo_open. This causes\\n(re)locking on of the real_dev.\\n\\nPropagate allmulti/promisc on flags change, not on the open. There\\nis a slight semantics change that vlans that are down now propagate\\nthe flags, but this seems unlikely to result in the real issues.\\n\\nReproducer:\\n\\n  echo 0 1 \u003e /sys/bus/netdevsim/new_device\\n\\n  dev_path=$(ls -d /sys/bus/netdevsim/devices/netdevsim0/net/*)\\n  dev=$(echo $dev_path | rev | cut -d/ -f1 | rev)\\n\\n  ip link set dev $dev name netdevsim0\\n  ip link set dev netdevsim0 up\\n\\n  ip link add link netdevsim0 name netdevsim0.100 type vlan id 100\\n  ip link set dev netdevsim0.100 allm\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: vlan: no propagar indicadores al abrir Con el bloqueo de la instancia del dispositivo, ahora existe la posibilidad de un interbloqueo: [ 1.211455] =============================================== [ 1.211571] ADVERTENCIA: posible bloqueo recursivo detectado [ 1.211687] 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 No contaminado [ 1.211823] -------------------------------------------- [ 1.211936] ip/184 is trying to acquire lock: [ 1.212032] ffff8881024a4c30 (\u0026amp;dev-\u0026gt;lock){+.+.}-{4:4}, at: dev_set_allmulti+0x4e/0xb0 [ 1.212207] [ 1.212207] but task is already holding lock: [ 1.212332] ffff8881024a4c30 (\u0026amp;dev-\u0026gt;lock){+.+.}-{4:4}, at: dev_open+0x50/0xb0 [ 1.212487] [ 1.212487] other info that might help us debug this: [ 1.212626] Possible unsafe locking scenario: [ 1.212626] [ 1.212751] CPU0 [ 1.212815] ---- [ 1.212871] lock(\u0026amp;dev-\u0026gt;lock); [ 1.212944] lock(\u0026amp;dev-\u0026gt;lock); [ 1.213016] [ 1.213016] *** DEADLOCK *** [ 1.213016] [ 1.213143] May be due to missing lock nesting notation [ 1.213143] [ 1.213294] 3 locks held by ip/184: [ 1.213371] #0: ffffffff838b53e0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x1b/0xa0 [ 1.213543] #1: ffffffff84e5fc70 (\u0026amp;net-\u0026gt;rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x37/0xa0 [ 1.213727] #2: ffff8881024a4c30 (\u0026amp;dev-\u0026gt;lock){+.+.}-{4:4}, at: dev_open+0x50/0xb0 [ 1.213895] [ 1.213895] stack backtrace: [ 1.213991] CPU: 0 UID: 0 PID: 184 Comm: ip Not tainted 6.14.0-rc5-01215-g032756b4ca7a-dirty #5 [ 1.213993] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 [ 1.213994] Call Trace: [ 1.213995]  [ 1.213996] dump_stack_lvl+0x8e/0xd0 [ 1.214000] print_deadlock_bug+0x28b/0x2a0 [ 1.214020] lock_acquire+0xea/0x2a0 [ 1.214027] __mutex_lock+0xbf/0xd40 [ 1.214038] dev_set_allmulti+0x4e/0xb0 # real_dev-\u0026gt;flags \u0026amp; IFF_ALLMULTI [ 1.214040] vlan_dev_open+0xa5/0x170 # ndo_open on vlandev [ 1.214042] __dev_open+0x145/0x270 [ 1.214046] __dev_change_flags+0xb0/0x1e0 [ 1.214051] netif_change_flags+0x22/0x60 # IFF_UP vlandev [ 1.214053] dev_change_flags+0x61/0xb0 # for each device in group from dev-\u0026gt;vlan_info [ 1.214055] vlan_device_event+0x766/0x7c0 # on netdevsim0 [ 1.214058] notifier_call_chain+0x78/0x120 [ 1.214062] netif_open+0x6d/0x90 [ 1.214064] dev_open+0x5b/0xb0 # locks netdevsim0 [ 1.214066] bond_enslave+0x64c/0x1230 [ 1.214075] do_set_master+0x175/0x1e0 # on netdevsim0 [ 1.214077] do_setlink+0x516/0x13b0 [ 1.214094] rtnl_newlink+0xaba/0xb80 [ 1.214132] rtnetlink_rcv_msg+0x440/0x490 [ 1.214144] netlink_rcv_skb+0xeb/0x120 [ 1.214150] netlink_unicast+0x1f9/0x320 [ 1.214153] netlink_sendmsg+0x346/0x3f0 [ 1.214157] __sock_sendmsg+0x86/0xb0 [ 1.214160] ____sys_sendmsg+0x1c8/0x220 [ 1.214164] ___sys_sendmsg+0x28f/0x2d0 [ 1.214179] __x64_sys_sendmsg+0xef/0x140 [ 1.214184] do_syscall_64+0xec/0x1d0 [ 1.214190] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1.214191] RIP: 0033:0x7f2d1b4a7e56 Device setup: netdevsim0 (down) ^ ^ bond netdevsim1.100@netdevsim1 allmulticast=on (down)  Al esclavizar el dispositivo inferior (netdevsim0) que tiene una VLAN, propagamos los indicadores allmuti/promisc de la VLAN durante ndo_open. Esto provoca el (re)bloqueo de real_dev. Allmulti/promisc se propaga cuando cambian los indicadores, no cuando est\u00e1n abiertos. Hay un ligero cambio sem\u00e1ntico: las VLAN inactivas ahora propagan los indicadores, pero es poco probable que esto cause los problemas reales. Reproductor: echo 0 1 \u0026gt; /sys/bus/netdevsim/new_device dev_path=$(ls -d /sys/bus/netdevsim/devices/netdevsim0/net/*) dev=$(echo $dev_path | rev | cut -d/ -f1 | rev) ip link set dev $dev name netdevsim0 ip link set dev netdevsim0 up ip link add link netdevsim0 name netdevsim0.100 type vlan id 100 ip link set dev netdevsim0.100 allm ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/8021q/vlan_dev.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"a32f1d4f1f4c9d978698f3c718621f6198f2e7ac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"b1e3eeb037256a2f1206a8d69810ec47eb152026\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"523fa0979d842443aa14b80002e45b471cbac137\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"53fb25e90c0a503a17c639341ba5e755cb2feb5c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"d537859e56bcc3091805c524484a4c85386b3cc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"299d7d27af6b5844cda06a0fdfa635705e1bc50f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"8980018a9806743d9b80837330d46f06ecf78516\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"538b43aa21e3b17c110104efd218b966d2eda5f8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c78dcbd47a68a7d25d2bee7a6c74b9136cb5fde\",\"lessThan\":\"27b918007d96402aba10ed52a6af8015230f1793\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/8021q/vlan_dev.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.23\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.23\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.293\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.237\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.181\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.135\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.88\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.24\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.12\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.3\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.4.293\",\"matchCriteriaId\":\"389EB980-4648-446E-A0DC-5FB0265E0F02\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.237\",\"matchCriteriaId\":\"0710B81E-E2FA-4E15-8F68-D297EBB4D50D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.181\",\"matchCriteriaId\":\"12331C9E-F601-4EFC-899E-369F98DCC70B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.135\",\"matchCriteriaId\":\"5B9ACE29-7445-4B6F-B761-6367C005E275\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.88\",\"matchCriteriaId\":\"6E5947E5-45E3-462A-829B-382B3B1C61BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.24\",\"matchCriteriaId\":\"1D35A8A8-F3EC-45E6-AD37-1F154B27529D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.12\",\"matchCriteriaId\":\"4A475784-BF3B-4514-81EE-49C8522FB24A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.14\",\"versionEndExcluding\":\"6.14.3\",\"matchCriteriaId\":\"483E2E15-2135-4EC6-AB64-16282C5EF704\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/27b918007d96402aba10ed52a6af8015230f1793\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/299d7d27af6b5844cda06a0fdfa635705e1bc50f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/523fa0979d842443aa14b80002e45b471cbac137\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/538b43aa21e3b17c110104efd218b966d2eda5f8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/53fb25e90c0a503a17c639341ba5e755cb2feb5c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8980018a9806743d9b80837330d46f06ecf78516\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a32f1d4f1f4c9d978698f3c718621f6198f2e7ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b1e3eeb037256a2f1206a8d69810ec47eb152026\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d537859e56bcc3091805c524484a4c85386b3cc8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T00:49:17+00:00",
      "cve": "CVE-2025-23163",
      "id": "CVE-2025-23163",
      "initial_release_date": "2025-05-01T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: vlan: don\u0027t propagate flags on open",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-23163.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T01:23:53Z",
      "cve": "CVE-2025-23163",
      "id": "CVE-2025-23163",
      "initial_release_date": "2025-05-02T02:03:34Z",
      "product_status:known_affected": "780",
      "product_status:recommended": "433",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-23163",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-23163.json",
      "version": "44"
    }
  }
}



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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

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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.


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.