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

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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.

Source published

11 Sep 2026 19:42:25 UTC

Source modified

19 Oct 2026 08:45:41 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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