Riskcovery

CVE-2026-46212

batman-adv: bla: prevent use-after-free when deleting claims

State
Published
Severity
8.8 High
Published
May 28, 2026
Updated
Aug 5, 2026
Reserved
May 13, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: bla: prevent use-after-free when deleting claims

When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put().

But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 1d4b241482d9025c537afb3c7c8419c72c0e0c82Affected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before a1a99837bb6169cfb9187abaa2005e8f12079426Affected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before b88c865dcf6e9f20bfe66a360d4b62941ef769b8Affected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 368449e467d5f1e2c2e987bf2bd57000ba75e10bAffected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472Affected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401Affected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 0cc9847c64cb6e61118bc78c9187c8209a7197faAffected
  • 23721387c409087fd3b97e274f34d3ddc0970b74 to before 4ae1709a314060a196981b344610d023ea841e57Affected
LinuxLinux
  • 3.5Affected
  • before 3.5Not affected
  • 5.10.258 through 5.10.*Not affected
  • 5.15.209 through 5.15.*Not affected
  • 6.1.175 through 6.1.*Not affected
  • 6.6.140 through 6.6.*Not affected
  • 6.12.90 through 6.12.*Not affected
  • 6.18.32 through 6.18.*Not affected
  • 7.0.9 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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