{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-89496", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89496", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-11T19:43:46.772Z", "updatedAt": "2026-10-19T08:47:47.928Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ocfs2: always run deallocs on copy-on-write completion", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: always run deallocs on copy-on-write completion\n\nLocal fuzzing of 6.12.94 has found the following memory leak\ncaused by doing 'copy_file_range()' within the same filesystem:\n\nunreferenced object 0xffff88812192c980 (size 32):\n comm \"syz.0.49\", pid 12095, jiffies 4294964143\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 ................\n c0 c5 92 21 81 88 ff ff 00 02 00 00 00 06 00 00 ...!............\n backtrace (crc 7068d63f):\n kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n slab_post_alloc_hook mm/slub.c:4152 [inline]\n slab_alloc_node mm/slub.c:4197 [inline]\n __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n kmalloc_noprof include/linux/slab.h:878 [inline]\n ocfs2_find_per_slot_free_list fs/ocfs2/alloc.c:6618 [inline]\n ocfs2_cache_block_dealloc+0x155/0x4b0 fs/ocfs2/alloc.c:6786\n ocfs2_cache_extent_block_free fs/ocfs2/alloc.c:6819 [inline]\n ocfs2_unlink_path+0x286/0x450 fs/ocfs2/alloc.c:2613\n ocfs2_rotate_subtree_left fs/ocfs2/alloc.c:2779 [inline]\n __ocfs2_rotate_tree_left+0x1f6f/0x2da0 fs/ocfs2/alloc.c:2985\n ocfs2_rotate_tree_left+0x283/0xe00 fs/ocfs2/alloc.c:3237\n ocfs2_try_to_merge_extent+0xf56/0x1a20 fs/ocfs2/alloc.c:3825\n ocfs2_split_extent+0x15f4/0x2940 fs/ocfs2/alloc.c:5138\n ocfs2_clear_ext_refcount+0x2f6/0x550 fs/ocfs2/refcounttree.c:3098\n ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3131 [inline]\n ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline]\n ocfs2_replace_cow+0x991/0x1660 fs/ocfs2/refcounttree.c:3349\n ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3427 [inline]\n ocfs2_refcount_cow+0x5e1/0x9f0 fs/ocfs2/refcounttree.c:3470\n ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2340 [inline]\n ocfs2_file_write_iter+0xbda/0x1880 fs/ocfs2/file.c:2451\n iter_file_splice_write+0x890/0xf60 fs/splice.c:743\n do_splice_from fs/splice.c:944 [inline]\n direct_splice_actor+0x232/0x480 fs/splice.c:1167\n splice_direct_to_actor+0x4b4/0xb60 fs/splice.c:1111\n do_splice_direct_actor fs/splice.c:1210 [inline]\n do_splice_direct+0x10f/0x1c0 fs/splice.c:1236\n do_sendfile+0x430/0xbf0 fs/read_write.c:1388\n\nunreferenced object 0xffff88812192c5c0 (size 32):\n comm \"syz.0.49\", pid 12095, jiffies 4294964143\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 29 70 00 00 00 00 00 00 19 00 00 00 00 00 00 00 )p..............\n backtrace (crc afec850f):\n kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]\n slab_post_alloc_hook mm/slub.c:4152 [inline]\n slab_alloc_node mm/slub.c:4197 [inline]\n __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358\n kmalloc_noprof include/linux/slab.h:878 [inline]\n kzalloc_noprof include/linux/slab.h:1014 [inline]\n ocfs2_cache_block_dealloc+0x25c/0x4b0 fs/ocfs2/alloc.c:6793\n ocfs2_cache_extent_block_free fs/ocfs2/alloc.c:6819 [inline]\n ocfs2_unlink_path+0x286/0x450 fs/ocfs2/alloc.c:2613\n ocfs2_rotate_subtree_left fs/ocfs2/alloc.c:2779 [inline]\n __ocfs2_rotate_tree_left+0x1f6f/0x2da0 fs/ocfs2/alloc.c:2985\n ocfs2_rotate_tree_left+0x283/0xe00 fs/ocfs2/alloc.c:3237\n ocfs2_try_to_merge_extent+0xf56/0x1a20 fs/ocfs2/alloc.c:3825\n ocfs2_split_extent+0x15f4/0x2940 fs/ocfs2/alloc.c:5138\n ocfs2_clear_ext_refcount+0x2f6/0x550 fs/ocfs2/refcounttree.c:3098\n ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3131 [inline]\n ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline]\n ocfs2_replace_cow+0x991/0x1660 fs/ocfs2/refcounttree.c:3349\n ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3427 [inline]\n ocfs2_refcount_cow+0x5e1/0x9f0 fs/ocfs2/refcounttree.c:3470\n ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2340 [inline]\n ocfs2_file_write_iter+0xbda/0x1880 fs/ocfs2/file.c:2451\n iter_file_splice_write+0x890/0xf60 fs/splice.c:743\n do_splice_from fs/splice.c:9\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "5ff30f07def6d0e6edacf47952807b5ff60f3af6" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "2753e12853ed2023555cec2c5fe22fbaabb2c0b7" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "f0261b3aca027f5c409a402ea22f6982750f911c" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "a4adaa722977f46511d4247172cd4ec991b80ff2" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "123c050eb96aae0bab74c9f06c6ad3de7992722b" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "71f07b7f90b3109c9098d1b9c8efbbeece5deb8a" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "09e93a60e18e83a630ff84ae00cb564bab96ab1f" }, { "version": "6f70fa519976a379d72781d927cf8e5f5b05ec86", "status": "affected", "versionType": "git", "lessThan": "82ea9d4fc05fb7a387db547c6a7c0aa6a3719616" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.32", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.32" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.109", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.50", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }