{"id":"CVE-2026-98868","revision":"f304f547c164445f8c59d937fbaab558","records":[{"revision":"f304f547c164445f8c59d937fbaab558","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98868","aliases":[],"title":"dm-pcache: reject a kset that overruns its segment","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: reject a kset that overruns its segment\n\ncache_replay(), the writeback worker and the GC worker read a kset of\nget_kset_onmedia_size() bytes and advance the position by it. A forged\nkey_num makes that size exceed the segment's remaining space, so the\nadvance walks past the segment and trips the cache_pos_advance() BUG_ON.\n\nReject a kset whose on-media size exceeds cache_seg_remain() before use.","state":0,"publishedAt":"2026-10-18T15:51:30.658+00:00","modifiedAt":"2026-10-19T09:27:02.926+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/dm-pcache/cache_gc.c\",\n                        \"drivers/md/dm-pcache/cache_key.c\",\n                        \"drivers/md/dm-pcache/cache_writeback.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1d57628ff95b32d5cfa8d8f50e07690c161e9cf0\",\n                            \"lessThan\": \"01a700e9278da5706c865b9ca3ae70fdb7b4531d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1d57628ff95b32d5cfa8d8f50e07690c161e9cf0\",\n                            \"lessThan\": \"96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1d57628ff95b32d5cfa8d8f50e07690c161e9cf0\",\n                            \"lessThan\": \"7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/dm-pcache/cache_gc.c\",\n                        \"drivers/md/dm-pcache/cache_key.c\",\n                        \"drivers/md/dm-pcache/cache_writeback.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/01a700e9278da5706c865b9ca3ae70fdb7b4531d","https://git.kernel.org/stable/c/96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10","https://git.kernel.org/stable/c/7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98868","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98868","identifiers":["CVE-2026-98868"]},"retained":false,"historicalAffected":[]}],"coverage":[]}