{"id":"CVE-2026-23097","revision":null,"records":[{"revision":"35707fc864844ce3ac13aa1e314233c4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-23097","aliases":[],"title":"migrate: correct lock ordering for hugetlb file folios","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmigrate: correct lock ordering for hugetlb file folios\n\nSyzbot has found a deadlock (analyzed by Lance Yang):\n\n1) Task (5749): Holds folio_lock, then tries to acquire i_mmap_rwsem(read lock).\n2) Task (5754): Holds i_mmap_rwsem(write lock), then tries to acquire\nfolio_lock.\n\nmigrate_pages()\n -> migrate_hugetlbs()\n -> unmap_and_move_huge_page() <- Takes folio_lock!\n -> remove_migration_ptes()\n -> __rmap_walk_file()\n -> i_mmap_lock_read() <- Waits for i_mmap_rwsem(read lock)!\n\nhugetlbfs_fallocate()\n -> hugetlbfs_punch_hole() <- Takes i_mmap_rwsem(write lock)!\n -> hugetlbfs_zero_partial_page()\n -> filemap_lock_hugetlb_folio()\n -> filemap_lock_folio()\n -> __filemap_get_folio <- Waits for folio_lock!\n\nThe migration path is the one taking locks in the wrong order according to\nthe documentation at the top of mm/rmap.c. So expand the scope of the\nexisting i_mmap_lock to cover the calls to remove_migration_ptes() too.\n\nThis is (mostly) how it used to be after commit c0d0381ade79. That was\nremoved by 336bf30eb765 for both file & anon hugetlb pages when it should\nonly have been removed for anon hugetlb pages.","state":0,"publishedAt":"2026-02-04T16:08:19.815+00:00","modifiedAt":"2026-10-19T18:25:30.652+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 \"mm/migrate.c\"\n ],\n \"versions\": [\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"e7396d23f9d5739f56cf9ab430c3a169f5508394\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"ad97b9a55246eb940a26ac977f80892a395cabf9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"5edb9854f8df5428b40990a1c7d60507da5bd330\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"526394af4e8ade89cacd1a9ce2b97712712fcc34\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"b75070823b89009f5123fd0e05a8e0c3d39937c1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"1b68efce6dd483d22f50d0d3800c4cfda14b1305\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"336bf30eb76580b579dc711ded5d599d905c0217\",\n \"lessThan\": \"b7880cb166ab62c2409046b2347261abf701530e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ef792d6ce0db6a56e56743b1de1716a982c3b851\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.9.9\",\n \"lessThan\": \"5.10\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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 \"mm/migrate.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.10\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.10\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.249\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.199\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.162\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.122\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.68\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.8\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/e7396d23f9d5739f56cf9ab430c3a169f5508394","https://git.kernel.org/stable/c/ad97b9a55246eb940a26ac977f80892a395cabf9","https://git.kernel.org/stable/c/5edb9854f8df5428b40990a1c7d60507da5bd330","https://git.kernel.org/stable/c/526394af4e8ade89cacd1a9ce2b97712712fcc34","https://git.kernel.org/stable/c/b75070823b89009f5123fd0e05a8e0c3d39937c1","https://git.kernel.org/stable/c/1b68efce6dd483d22f50d0d3800c4cfda14b1305","https://git.kernel.org/stable/c/b7880cb166ab62c2409046b2347261abf701530e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23097","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-23097","identifiers":["CVE-2026-23097"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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