{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23097", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.964Z", "datePublished": "2026-02-04T16:08:19.815Z", "dateUpdated": "2026-02-04T16:08:19.815Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-04T16:08:19.815Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/migrate.c"], "versions": [{"version": "336bf30eb76580b579dc711ded5d599d905c0217", "lessThan": "526394af4e8ade89cacd1a9ce2b97712712fcc34", "status": "affected", "versionType": "git"}, {"version": "336bf30eb76580b579dc711ded5d599d905c0217", "lessThan": "b75070823b89009f5123fd0e05a8e0c3d39937c1", "status": "affected", "versionType": "git"}, {"version": "336bf30eb76580b579dc711ded5d599d905c0217", "lessThan": "1b68efce6dd483d22f50d0d3800c4cfda14b1305", "status": "affected", "versionType": "git"}, {"version": "336bf30eb76580b579dc711ded5d599d905c0217", "lessThan": "b7880cb166ab62c2409046b2347261abf701530e", "status": "affected", "versionType": "git"}, {"version": "ef792d6ce0db6a56e56743b1de1716a982c3b851", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/migrate.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.68", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc7", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.19-rc7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9.9"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/526394af4e8ade89cacd1a9ce2b97712712fcc34"}, {"url": "https://git.kernel.org/stable/c/b75070823b89009f5123fd0e05a8e0c3d39937c1"}, {"url": "https://git.kernel.org/stable/c/1b68efce6dd483d22f50d0d3800c4cfda14b1305"}, {"url": "https://git.kernel.org/stable/c/b7880cb166ab62c2409046b2347261abf701530e"}], "title": "migrate: correct lock ordering for hugetlb file folios", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-23097", "lastModified": "2026-02-04T17:16:20.570", "metrics": {}, "published": "2026-02-04T17:16:20.570", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1b68efce6dd483d22f50d0d3800c4cfda14b1305"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/526394af4e8ade89cacd1a9ce2b97712712fcc34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b75070823b89009f5123fd0e05a8e0c3d39937c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7880cb166ab62c2409046b2347261abf701530e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}