# CVE-2026-72229: batman-adv: clean untagged VLAN on netdev registration failure

Status: published. Published: 2026-08-15. Updated: 2026-11-06.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < 86e32dfb6a6fe29898f4a562b7b6e38e480bba4d (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < 06ae245168268b705a204f93c318b30107d10e92 (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < dbca15fcbeed5276af440a53aed3901590fa7fc9 (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < f2423da55976ea249f73029e468aefda4b94acba (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < f15ca6250591cfe78408114a54eaa8d58da51bfa (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < c945f6007e7851e74706c72f98763023699bcd97 (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < 5a82c558098889cc8bfff85cc62f563833205d91 (affected, git); ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569; < 8669a550c752d86baebc5fdc83b8ff35c4372c0e (affected, git). Source: CNA: Linux
- Linux / Linux: 3.13 (affected); ≥ 0; < 3.13 (unaffected, semver); ≥ 5.10.261; ≤ 5.10.* (unaffected, semver); ≥ 5.15.212; ≤ 5.15.* (unaffected, semver); ≥ 6.1.178; ≤ 6.1.* (unaffected, semver); ≥ 6.6.145; ≤ 6.6.* (unaffected, semver); ≥ 6.12.97; ≤ 6.12.* (unaffected, semver); ≥ 6.18.40; ≤ 6.18.* (unaffected, semver); ≥ 7.1.5; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.55%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d (CNA: Linux)

- https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92 (CNA: Linux)

- https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9 (CNA: Linux)

- https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba (CNA: Linux)

- https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa (CNA: Linux)

- https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97 (CNA: Linux)

- https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91 (CNA: Linux)

- https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e (CNA: Linux)

- https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72229; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72229; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72229; retrieved 2026-11-06; source updated Not reported

Revision: 4b040ec63e3a4399519c845b291dfeedb49eb0513d26a87e6b2747f1982e4f68

Canonical: https://y2.dev/cve/CVE-2026-72229

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