{"id":"CVE-2026-98867","title":"dm-pcache: bound the logical key offset from persistent memory","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: bound the logical key offset from persistent memory\n\ncache_key_decode() takes a key's logical off from the cache device and\nlater indexes req_key_tree->subtr…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 3d5a87cb909c1f375f08065b20123fa5db5958d8","Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 10449703200076980704894c3d68d6796182371b","Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 97fc4b53dbe4a983fdf093243067fa6a64562307","Linux 6.18"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:51:29.499Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98867","references":[{"url":"https://git.kernel.org/stable/c/3d5a87cb909c1f375f08065b20123fa5db5958d8"},{"url":"https://git.kernel.org/stable/c/10449703200076980704894c3d68d6796182371b"},{"url":"https://git.kernel.org/stable/c/97fc4b53dbe4a983fdf093243067fa6a64562307"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.457Z","slug":"CVE-2026-98867","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: bound the logical key offset from persistent memory\n\ncache_key_decode() takes a key's logical off from the cache device and\nlater indexes req_key_tree->subtrees[] by it in get_subtree(). An off\npast the device forms a subtree pointer outside the array, which\nrb_insert() writes through during replay.\n\nReject a key of zero length, or whose off+len (computed in 64 bits)\nexceeds the device size, before it is used.\n\n## Affected\n\n- `Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 3d5a87cb909c1f375f08065b20123fa5db5958d8`\n- `Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 10449703200076980704894c3d68d6796182371b`\n- `Linux >= 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 < 97fc4b53dbe4a983fdf093243067fa6a64562307`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}