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Description

In 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]

PUBLISHED Reserved 2026-05-13 | Published 2026-05-28 | Updated 2026-05-30 | Assigner Linux




HIGH: 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (git) before aafcbaf1159ea224528ca4075d0ba8c10ef374af
affected

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (git) before 6e20700f8c524ac379ba8274ff5d453023b7c006
affected

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (git) before 09dc0d1a12222ffca6481916eab3cfea477b9620
affected

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (git) before 67bceeb22207f1f5a402973a3a0809e5f2698f38
affected

c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (git) before f03e8583532941b07761c5429de7d50766fa3110
affected

Default status
affected

2.6.38
affected

Any version before 2.6.38
unaffected

6.6.140 (semver)
unaffected

6.12.90 (semver)
unaffected

6.18.32 (semver)
unaffected

7.0.9 (semver)
unaffected

7.1-rc4 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/aafcbaf1159ea224528ca4075d0ba8c10ef374af

git.kernel.org/...c/6e20700f8c524ac379ba8274ff5d453023b7c006

git.kernel.org/...c/09dc0d1a12222ffca6481916eab3cfea477b9620

git.kernel.org/...c/67bceeb22207f1f5a402973a3a0809e5f2698f38

git.kernel.org/...c/f03e8583532941b07761c5429de7d50766fa3110

cve.org (CVE-2026-46238)

nvd.nist.gov (CVE-2026-46238)

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