CVE-2026-46238

Summary

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]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 86b2b58d7c228d850c8c78e4144e6123e8ed2718affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 384e3050a42be9085d50507b4d5f8266a588d742affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 8c16c68fdbb69778f8d04f650340c3f4d1518f8eaffected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < aafcbaf1159ea224528ca4075d0ba8c10ef374afaffected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6e20700f8c524ac379ba8274ff5d453023b7c006affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 09dc0d1a12222ffca6481916eab3cfea477b9620affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 67bceeb22207f1f5a402973a3a0809e5f2698f38affected
LinuxLinuxc6c8fea29769d998d94fcec9b9f14d4b52b349d3 < f03e8583532941b07761c5429de7d50766fa3110affected
LinuxLinux2.6.38affected
LinuxLinux0 < 2.6.38unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.90 <= 6.12.*unaffected
LinuxLinux6.18.32 <= 6.18.*unaffected
LinuxLinux7.0.9 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References