CVE-2026-80957

Summary

In the Linux kernel, the following vulnerability has been resolved:

dm-pcache: detect a cycle in the last-kset chain during replay

cache_replay() follows the on-media last-kset chain by next_cache_seg_id with no cond_resched(). A forged chain that points back into a segment it has already visited makes the replay loop follow it forever.

Cap the last-kset hops at cache->n_segs; a valid chain visits each segment at most once.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 663ee2f3824a505b983162de44134e789f8230daaffected
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 5311dfc5cd70edccd110257e3f30b2c1dcd3768daffected
LinuxLinux1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 16c3b3a326e70f246a605b3dc27b7f83ba4743e3affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References