{ "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-2026-80879", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80879", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-04T16:49:02.905Z", "updatedAt": "2026-09-04T16:49:02.905Z", "importedAt": "2026-10-24T01:58:30.346Z", "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: fix circular locking dependency in ocfs2_dio_end_io_write", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix circular locking dependency in ocfs2_dio_end_io_write\n\nA circular locking dependency involves INODE_ALLOC_SYSTEM_INODE,\nEXTENT_ALLOC_SYSTEM_INODE, and ORPHAN_DIR_SYSTEM_INODE.\n\n1. ocfs2_mknod() acquires INODE_ALLOC then EXTENT_ALLOC.\n\n2. ocfs2_dio_end_io_write() acquires EXTENT_ALLOC for unwritten\n extents, then ORPHAN_DIR via ocfs2_del_inode_from_orphan() while still\n holding EXTENT_ALLOC.\n\n3. ocfs2_wipe_inode() acquires ORPHAN_DIR then INODE_ALLOC via\n ocfs2_remove_inode.\n\nBreak the cycle in ocfs2_dio_end_io_write() by freeing the allocation\ncontexts (releasing EXTENT_ALLOC) before acquiring ORPHAN_DIR.\n\nWARNING: possible circular locking dependency detected\n------------------------------------------------------\nis trying to acquire lock:\nffff8881e78b33a0\n(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at:\nocfs2_evict_inode+0x1539/0x43b0 fs/ocfs2/inode.c:1299\n\nbut task is already holding lock:\nffff8881e78b4fa0\n(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at:\nocfs2_evict_inode+0xe97/0x43b0 fs/ocfs2/inode.c:1299\n\nthe existing dependency chain (in reverse order) is:\n\n-> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:\n inode_lock include/linux/fs.h:1029 [inline]\n ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2728\n ocfs2_dio_end_io+0xf9c/0x1370 fs/ocfs2/aops.c:2418\n dio_complete+0x25b/0x790 fs/direct-io.c:281\n\n-> #1 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:\n inode_lock include/linux/fs.h:1029 [inline]\n ocfs2_reserve_suballoc_bits+0x16d/0x4840 fs/ocfs2/suballoc.c:882\n ocfs2_reserve_new_metadata_blocks+0x415/0x9a0\n fs/ocfs2/suballoc.c:1078\n ocfs2_mknod+0x10f3/0x2260 fs/ocfs2/namei.c:351\n\n-> #0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:\n __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237\n lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868\n down_write+0x96/0x200 kernel/locking/rwsem.c:1625\n inode_lock include/linux/fs.h:1029 [inline]\n ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]\n ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]\n ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]\n ocfs2_evict_inode+0x1539/0x43b0 fs/ocfs2/inode.c:1299\n\nChain exists of:\n &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] -->\n &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] -->\n &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]\n\n Possible unsafe locking scenario:\n\n CPU0 CPU1\n ---- ----\n lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);\n lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);\n lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);\n lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);\n\n *** DEADLOCK ***", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "97c03c0e9f73a5049794b3c69ee60fb5e8b0ebd8", "status": "affected", "versionType": "git", "lessThan": "f0ae0a6ca87dc2d4a789f71cdedb808ba6c16990" }, { "version": "1e99bb19994246514d63e656492904176f9d5edd", "status": "affected", "versionType": "git", "lessThan": "137e8b4823a9a11928428d4ec0a0cacb2f50a769" }, { "version": "91e05ac2336d00d5b99fc774be4bd50039084796", "status": "affected", "versionType": "git", "lessThan": "4273548e418bd935430d35e9d052870f323441f3" }, { "version": "886f97fa59d0bbfa9859fb1a66dd9e014b522d89", "status": "affected", "versionType": "git", "lessThan": "49b34bd3ad69611af03590a23abf2cda9ac1073d" }, { "version": "ea5bb1d20da756e4f41a48dad42b2e7d6e73f71e", "status": "affected", "versionType": "git", "lessThan": "ff187c502b39389b0d732cb7050a3db8e5ebfcd6" }, { "version": "3c636a3edca9c3f180b3079f94fe7e115730d9c6", "status": "affected", "versionType": "git", "lessThan": "ae1f3460833d3e427420ab260278ec0e45d68c86" }, { "version": "d647c5b2fbf81560818dacade360abc8c00a9665", "status": "affected", "versionType": "git", "lessThan": "f3dd1e534e9de64669415f8239e0094afecfed78" }, { "version": "d647c5b2fbf81560818dacade360abc8c00a9665", "status": "affected", "versionType": "git", "lessThan": "ff6f26c58421614b02694ac9d219ac61d924bc68" }, { "version": "069c3fb310e9336cf48cfdf8748a32c29fd0193d", "status": "affected", "versionType": "git" }, { "version": "5.10.258", "status": "affected", "versionType": "semver", "lessThan": "5.10.261" }, { "version": "5.15.209", "status": "affected", "versionType": "semver", "lessThan": "5.15.212" }, { "version": "6.1.175", "status": "affected", "versionType": "semver", "lessThan": "6.1.178" }, { "version": "6.6.140", "status": "affected", "versionType": "semver", "lessThan": "6.6.145" }, { "version": "6.12.86", "status": "affected", "versionType": "semver", "lessThan": "6.12.97" }, { "version": "6.18.27", "status": "affected", "versionType": "semver", "lessThan": "6.18.40" }, { "version": "7.0.4", "status": "affected", "versionType": "semver", "lessThan": "7.1" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "7.1", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "7.1" }, { "version": "5.10.261", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.212", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.178", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.145", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.97", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }