CVE-2026-72229

Summary

In 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 Software

VendorProductVersion RangeStatus
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 86e32dfb6a6fe29898f4a562b7b6e38e480bba4daffected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 06ae245168268b705a204f93c318b30107d10e92affected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < dbca15fcbeed5276af440a53aed3901590fa7fc9affected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < f2423da55976ea249f73029e468aefda4b94acbaaffected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < f15ca6250591cfe78408114a54eaa8d58da51bfaaffected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < c945f6007e7851e74706c72f98763023699bcd97affected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 5a82c558098889cc8bfff85cc62f563833205d91affected
LinuxLinux5d2c05b213377694a2aa8ce1ed9b23f7c39b0569 < 8669a550c752d86baebc5fdc83b8ff35c4372c0eaffected
LinuxLinux3.13affected
LinuxLinux0 < 3.13unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References