CVE-2026-98867

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

dm-pcache: bound the logical key offset from persistent memory

cache key decode() takes a key's logical off from the cache device and later indexes req key tree->subtrees[] by it in get subtree(). An off past the device forms a subtree pointer outside the array, which rb insert() writes through during replay.

Reject a key of zero length, or whose off+len (computed in 64 bits) exceeds the device size, before it is used.