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

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Summary

CVECVE-2026-46212
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:36 UTC
Updated2026-06-10 19:16:30 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000300000 probability, percentile 0.090130000 (date 2026-06-04)

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 1d4b241482d9025c537afb3c7c8419c72c0e0c82 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 a1a99837bb6169cfb9187abaa2005e8f12079426 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 b88c865dcf6e9f20bfe66a360d4b62941ef769b8 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 368449e467d5f1e2c2e987bf2bd57000ba75e10b git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 0cc9847c64cb6e61118bc78c9187c8209a7197fa git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 4ae1709a314060a196981b344610d023ea841e57 git Not specified
CNA Linux Linux affected 3.5 Not specified
CNA Linux Linux unaffected 3.5 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.90 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.32 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.9 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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