batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface

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Summary

CVECVE-2026-64094
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:50 UTC
Updated2026-07-19 16:17:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface Without rtnl_lock held, a hardif might be retrieved as primary interface of a meshif, but then (while operating on this interface) getting decoupled from the mesh interface. In this case, the meshif still exists but the pointer from the primary hardif to the meshif is set to NULL. The mesh_iface must be checked first to be non-NULL before continuing to send an ARP request using meshif.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 53cb3511f6eda37d3bd923545fdba6013b6d7bb7 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 efb62458c94db1fe3a287e7e89c31b0cfb03f938 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 2a8c9e86529156c62d9187b9ed9454c31665ad33 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 6921a7683ae9ad0208d829e71f725a9e25ccff49 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 555b8d3f5c313d81d46274fd0976352dafc80124 git Not specified
CNA Linux Linux affected 23721387c409087fd3b97e274f34d3ddc0970b74 f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24 git Not specified
CNA Linux Linux affected 3.5 Not specified
CNA Linux Linux unaffected 3.5 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2a8c9e86529156c62d9187b9ed9454c31665ad33 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/555b8d3f5c313d81d46274fd0976352dafc80124 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/efb62458c94db1fe3a287e7e89c31b0cfb03f938 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6921a7683ae9ad0208d829e71f725a9e25ccff49 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/53cb3511f6eda37d3bd923545fdba6013b6d7bb7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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