CVE-2025-39796 (GCVE-0-2025-39796)
Vulnerability from cvelistv5
Published
2025-09-12 15:59
Modified
2025-09-29 05:59
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: lapbether: ignore ops-locked netdevs
Syzkaller managed to trigger lock dependency in xsk_notify via
register_netdevice. As discussed in [0], using register_netdevice
in the notifiers is problematic so skip adding lapbeth for ops-locked
devices.
xsk_notifier+0xa4/0x280 net/xdp/xsk.c:1645
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
unregister_netdevice_many_notify+0xf9d/0x2700 net/core/dev.c:12077
unregister_netdevice_many net/core/dev.c:12140 [inline]
unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984
register_netdevice+0x18f1/0x2270 net/core/dev.c:11149
lapbeth_new_device drivers/net/wan/lapbether.c:420 [inline]
lapbeth_device_event+0x5b1/0xbe0 drivers/net/wan/lapbether.c:462
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230
call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
call_netdevice_notifiers net/core/dev.c:2282 [inline]
__dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9497
netif_change_flags+0x108/0x160 net/core/dev.c:9526
dev_change_flags+0xba/0x250 net/core/dev_api.c:68
devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1200
inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1001
0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wan/lapbether.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "57a7ef338a2cd62a22a15a199ab9afd3d953df55",
"status": "affected",
"version": "4c975fd700022c90e61a46326e3444e08317876e",
"versionType": "git"
},
{
"lessThan": "628e233c1fefcc227fae9bdcff6be8ac92e1b4d2",
"status": "affected",
"version": "4c975fd700022c90e61a46326e3444e08317876e",
"versionType": "git"
},
{
"lessThan": "53898ebabe843bfa7baea9dae152797d5d0563c9",
"status": "affected",
"version": "4c975fd700022c90e61a46326e3444e08317876e",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/wan/lapbether.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"lessThan": "6.15",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"version": "6.15.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.11",
"versionStartIncluding": "6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16.2",
"versionStartIncluding": "6.15",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17",
"versionStartIncluding": "6.15",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lapbether: ignore ops-locked netdevs\n\nSyzkaller managed to trigger lock dependency in xsk_notify via\nregister_netdevice. As discussed in [0], using register_netdevice\nin the notifiers is problematic so skip adding lapbeth for ops-locked\ndevices.\n\n xsk_notifier+0xa4/0x280 net/xdp/xsk.c:1645\n notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\n call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\n call_netdevice_notifiers net/core/dev.c:2282 [inline]\n unregister_netdevice_many_notify+0xf9d/0x2700 net/core/dev.c:12077\n unregister_netdevice_many net/core/dev.c:12140 [inline]\n unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984\n register_netdevice+0x18f1/0x2270 net/core/dev.c:11149\n lapbeth_new_device drivers/net/wan/lapbether.c:420 [inline]\n lapbeth_device_event+0x5b1/0xbe0 drivers/net/wan/lapbether.c:462\n notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\n call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\n call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\n call_netdevice_notifiers net/core/dev.c:2282 [inline]\n __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9497\n netif_change_flags+0x108/0x160 net/core/dev.c:9526\n dev_change_flags+0xba/0x250 net/core/dev_api.c:68\n devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1200\n inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1001\n\n0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/"
}
],
"providerMetadata": {
"dateUpdated": "2025-09-29T05:59:37.011Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/57a7ef338a2cd62a22a15a199ab9afd3d953df55"
},
{
"url": "https://git.kernel.org/stable/c/628e233c1fefcc227fae9bdcff6be8ac92e1b4d2"
},
{
"url": "https://git.kernel.org/stable/c/53898ebabe843bfa7baea9dae152797d5d0563c9"
}
],
"title": "net: lapbether: ignore ops-locked netdevs",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-39796",
"datePublished": "2025-09-12T15:59:32.871Z",
"dateReserved": "2025-04-16T07:20:57.132Z",
"dateUpdated": "2025-09-29T05:59:37.011Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39796\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-12T16:15:33.987\",\"lastModified\":\"2025-09-15T15:21:42.937\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: lapbether: ignore ops-locked netdevs\\n\\nSyzkaller managed to trigger lock dependency in xsk_notify via\\nregister_netdevice. As discussed in [0], using register_netdevice\\nin the notifiers is problematic so skip adding lapbeth for ops-locked\\ndevices.\\n\\n xsk_notifier+0xa4/0x280 net/xdp/xsk.c:1645\\n notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\\n call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\\n call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\\n call_netdevice_notifiers net/core/dev.c:2282 [inline]\\n unregister_netdevice_many_notify+0xf9d/0x2700 net/core/dev.c:12077\\n unregister_netdevice_many net/core/dev.c:12140 [inline]\\n unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984\\n register_netdevice+0x18f1/0x2270 net/core/dev.c:11149\\n lapbeth_new_device drivers/net/wan/lapbether.c:420 [inline]\\n lapbeth_device_event+0x5b1/0xbe0 drivers/net/wan/lapbether.c:462\\n notifier_call_chain+0xbc/0x410 kernel/notifier.c:85\\n call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2230\\n call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]\\n call_netdevice_notifiers net/core/dev.c:2282 [inline]\\n __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9497\\n netif_change_flags+0x108/0x160 net/core/dev.c:9526\\n dev_change_flags+0xba/0x250 net/core/dev_api.c:68\\n devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1200\\n inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1001\\n\\n0: https://lore.kernel.org/netdev/20250625140357.6203d0af@kernel.org/\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/53898ebabe843bfa7baea9dae152797d5d0563c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57a7ef338a2cd62a22a15a199ab9afd3d953df55\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/628e233c1fefcc227fae9bdcff6be8ac92e1b4d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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