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VulnerabilityPublished Updated

CVE-2026-72229: Linux kernel · batman-adv: clean untagged VLAN on netdev registration failure

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f2423da55976ea249f73029e468aefda4b94acba : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 UTC

Severity
Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in f2423da55976ea249f73029e468aefda4b94acba, f15ca6250591cfe78408114a54eaa8d58da51bfa, dbca15fcbeed5276af440a53aed3901590fa7fc9 +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < f2423da55976ea249f73029e468aefda4b94acba
Fixed in
  • f2423da55976ea249f73029e468aefda4b94acba
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < f15ca6250591cfe78408114a54eaa8d58da51bfa
Fixed in
  • f15ca6250591cfe78408114a54eaa8d58da51bfa
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < dbca15fcbeed5276af440a53aed3901590fa7fc9
Fixed in
  • dbca15fcbeed5276af440a53aed3901590fa7fc9
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < c945f6007e7851e74706c72f98763023699bcd97
Fixed in
  • c945f6007e7851e74706c72f98763023699bcd97
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < 8669a550c752d86baebc5fdc83b8ff35c4372c0e
Fixed in
  • 8669a550c752d86baebc5fdc83b8ff35c4372c0e
LinuxLinuxAffected
  • ≥ 5d2c05b213377694a2aa8ce1ed9b23f7c39b0569, < 86e32dfb6a6fe29898f4a562b7b6e38e480bba4d
Fixed in
  • 86e32dfb6a6fe29898f4a562b7b6e38e480bba4d

Description

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.

References

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