{"schema":"threatline.record/2","record":{"id":"CVE-2026-98223","aliases":[],"summary":"mm: filemap: retain mapped dropbehind folios","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: filemap: retain mapped dropbehind folios\n\nFault-around can map ready dropbehind folios without going through the\nnormal page-cache lookup that clears dropbehind.  A mapping represents a\ncompeting cached user, so retain the folio instead of forcibly unmapping\nit when writeback completes.\n\nFor a mapped folio, folio_unmap_invalidate() can call\nunmap_mapping_folio(), which takes i_mmap_rwsem and may sleep.  Retaining\nmapped folios avoids this path when folio_end_dropbehind() runs in\nnon-preemptible task context.\n\nTal was able to trigger a sleeping-in-atomic warning due to this [1].\n\nUnmapped dropbehind folios continue through the existing invalidation path.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","source_modified_at":"2026-10-19T09:15:55.143Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"fb7d3bc4149395c1ae99029c852eab6c28fc3c88","lessThan":"2897601dffe576fcd87a4259102f41f7fb0cbfc8","status":"affected","versionType":"git"},{"version":"fb7d3bc4149395c1ae99029c852eab6c28fc3c88","lessThan":"77c0fade37c80e8aa16ac048a9828249055e3f66","status":"affected","versionType":"git"},{"version":"fb7d3bc4149395c1ae99029c852eab6c28fc3c88","lessThan":"848d2ce2fce15fbdc083fbf9691bfa72911033c4","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","source_modified_at":"2026-10-19T09:15:55.143Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.14","status":"affected"},{"version":"0","lessThan":"6.14","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","source_modified_at":"2026-10-19T09:15:55.143Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2897601dffe576fcd87a4259102f41f7fb0cbfc8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","source_modified_at":"2026-10-19T09:15:55.143Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"77c0fade37c80e8aa16ac048a9828249055e3f66","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","source_modified_at":"2026-10-19T09:15:55.143Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"848d2ce2fce15fbdc083fbf9691bfa72911033c4","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00173,"percentile":0.06449,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:44:58.472Z","modified_at":"2026-10-19T09:15:55.143Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98223","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:55.143Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98223","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/2897601dffe576fcd87a4259102f41f7fb0cbfc8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/77c0fade37c80e8aa16ac048a9828249055e3f66"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/848d2ce2fce15fbdc083fbf9691bfa72911033c4"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:15:55.143Z","content_hash":"8a8fc8d8b07913e2290414876dfca8af57f0ffca2f69d770324759e8924ca622"}}