batman-adv: stop caching unowned originator pointers in BAT IV

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Summary

CVECVE-2026-46238
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:39 UTC
Updated2026-05-28 13:44:01 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 aafcbaf1159ea224528ca4075d0ba8c10ef374af git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6e20700f8c524ac379ba8274ff5d453023b7c006 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 09dc0d1a12222ffca6481916eab3cfea477b9620 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 67bceeb22207f1f5a402973a3a0809e5f2698f38 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 f03e8583532941b07761c5429de7d50766fa3110 git Not specified
CNA Linux Linux affected 2.6.38 Not specified
CNA Linux Linux unaffected 2.6.38 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/6e20700f8c524ac379ba8274ff5d453023b7c006 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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