CVE-2026-72229: Linux kernel · batman-adv: clean untagged VLAN on netdev registration failure
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f2423da55976ea249f73029e468aefda4b94acba : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:04 UTC
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
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d (opens in a new tab)
- git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92 (opens in a new tab)
- git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9 (opens in a new tab)
- git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba (opens in a new tab)
- git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa (opens in a new tab)
- git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97 (opens in a new tab)
- git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91 (opens in a new tab)
- git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e (opens in a new tab)