{"id":"CVE-2026-89617","revision":"d393025747944f17a32aa2184fbba3ab","records":[{"revision":"d393025747944f17a32aa2184fbba3ab","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89617","aliases":[],"title":"fs/ntfs3: validate dirty page table on log replay","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate dirty page table on log replay\n\nEach DIR_PAGE_ENTRY ends in a page_lcns[] array whose length is the on-disk\nlcns_follow field. check_rstbl() validates the table bookkeeping but never\nchecks that this array fits in the entry, so a crafted lcns_follow lets the\nv0->v1 conversion memmove and later replay passes run off the entry.\n\nAdd check_dp_table() to reject, right after check_rstbl(), any entry larger\nthan its size claims via struct_size() (the same expression used to allocate\nthese entries, so the check is overflow-safe by construction). All consumers\ncan then trust lcns_follow as the real capacity. This covers every\npage_lcns[] access whose index is bounded by the entry itself (the\nconversion memmove, the HotFix store via find_dp(), and the self-bounded\nscan loops). Accesses whose index comes from the log record need a separate\nbound and are handled in a follow-up patch.","state":0,"publishedAt":"2026-09-11T19:45:16.737+00:00","modifiedAt":"2026-10-19T08:49:49.792+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                        \"fs/ntfs3/fslog.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"0e07ea2fc45a7b4757ef7bf1f692cc0180a08323\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"1e90b1703ee1a04cd3e9e399353fc536f5f3ba10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"d23155634a4bc1183e761d5eb2c043b2e693cc98\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"1200c2779c43b62656ccbb67df9468a7a9af2484\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"0908da07c23be4f94b99dfd9a94765525f0fe4bd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"006cb7713dec10368e699abc4367e5faa334c9a5\",\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                        \"fs/ntfs3/fslog.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/0e07ea2fc45a7b4757ef7bf1f692cc0180a08323","https://git.kernel.org/stable/c/1e90b1703ee1a04cd3e9e399353fc536f5f3ba10","https://git.kernel.org/stable/c/d23155634a4bc1183e761d5eb2c043b2e693cc98","https://git.kernel.org/stable/c/1200c2779c43b62656ccbb67df9468a7a9af2484","https://git.kernel.org/stable/c/2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56","https://git.kernel.org/stable/c/0908da07c23be4f94b99dfd9a94765525f0fe4bd","https://git.kernel.org/stable/c/006cb7713dec10368e699abc4367e5faa334c9a5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89617","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89617","identifiers":["CVE-2026-89617"]},"retained":false,"historicalAffected":[]}],"coverage":[]}