GHSA-7P74-4RVH-GR76
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32In the Linux kernel, the following vulnerability has been resolved:
batman-adv: clean untagged VLAN on netdev registration failure
When an mesh interface is registered, it creates an untagged struct batadv_meshif_vlan on top of it via the NETDEV_REGISTER notifier. But in this process, another receiver of this notification can veto the registration. The netdev registration will be aborted because of this veto.
The register_netdevice() call will try to clean up the net_device using unregister_netdevice_queue() - which only uses the .priv_destructor to free private resources. In this situation, .dellink will not be called.
The cleanup of the untagged batadv_meshif_vlan must thefore be done in the destructor to avoid a leak of this object.
{
"affected": [],
"aliases": [
"CVE-2026-72229"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T06:21:49Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: clean untagged VLAN on netdev registration failure\n\nWhen an mesh interface is registered, it creates an untagged struct\nbatadv_meshif_vlan on top of it via the NETDEV_REGISTER notifier. But in\nthis process, another receiver of this notification can veto the\nregistration. The netdev registration will be aborted because of this veto.\n\nThe register_netdevice() call will try to clean up the net_device using\nunregister_netdevice_queue() - which only uses the .priv_destructor to\nfree private resources. In this situation, .dellink will not be called.\n\nThe cleanup of the untagged batadv_meshif_vlan must thefore be done in the\ndestructor to avoid a leak of this object.",
"id": "GHSA-7p74-4rvh-gr76",
"modified": "2026-08-15T06:32:16Z",
"published": "2026-08-15T06:32:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72229"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba"
}
],
"schema_version": "1.4.0",
"severity": []
}
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|---|
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