{"id":"CVE-2026-90320","revision":"9031a602cd284b45b92303acbfef2d55","records":[{"revision":"9031a602cd284b45b92303acbfef2d55","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90320","aliases":[],"title":"ocfs2: validate external xattr entries when reading metadata","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate external xattr entries when reading metadata\n\nocfs2_validate_xattr_block() checks the xattr block header before the\nblock reaches higher-level xattr users, but it does not verify that a\nnon-indexed block's xh_count and entry offsets fit inside the block. \nIndexed buckets likewise reach list/get consumers after ECC without an\nentry-bounds check.\n\nUse the flat xattr entry validator for non-indexed external xattr blocks,\nand use a bucket-specific validator for indexed buckets at metadata read\ntime.  The bucket validator keeps the entry array bounded by the first\nbucket block while checking name/value offsets against the bucket block\nthey target.\n\nReject corrupted external xattr metadata before listxattr() or getxattr()\ncan walk out-of-range entry arrays or name/value offsets.\n\nValidation reproduced this kernel report:\nBUG: KASAN: use-after-free in ocfs2_xattr_list_entries+0xd7/0x190\nRead of size 1 at addr ffff88810a654007 by task ocfs2_xattr_lis/630\nCall Trace:\n  dump_stack_lvl+0x66/0xa0\n  print_report+0xce/0x630\n  kasan_report+0xe0/0x110\n  ocfs2_xattr_list_entries+0xd7/0x190\n  ocfs2_listxattr+0x3f6/0x610\n  listxattr+0x90/0xe0\n  path_listxattrat+0xed/0x220\n  do_syscall_64+0x115/0x6a0\n  entry_SYSCALL_64_after_hwframe+0x77/0x7f","state":0,"publishedAt":"2026-09-17T16:08:37.497+00:00","modifiedAt":"2026-10-21T12:50:55.685+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                        \"fs/ocfs2/xattr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"cf1d6c763fbcb115263114302485ad17e7933d87\",\n                            \"lessThan\": \"dc5778dbd0b6c411107a0e37e913a94b3c2f2728\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cf1d6c763fbcb115263114302485ad17e7933d87\",\n                            \"lessThan\": \"ee4ef26927e967ea699b3f0d7ecf97ce044fbc79\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cf1d6c763fbcb115263114302485ad17e7933d87\",\n                            \"lessThan\": \"9f4129b6905b7d638bbc9eb8013c3989cbe30b7e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"cf1d6c763fbcb115263114302485ad17e7933d87\",\n                            \"lessThan\": \"2cf82b46d5e43be0dfbaac7fa1073cec2fc1f5e6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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                        \"fs/ocfs2/xattr.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.28\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.28\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/dc5778dbd0b6c411107a0e37e913a94b3c2f2728","https://git.kernel.org/stable/c/ee4ef26927e967ea699b3f0d7ecf97ce044fbc79","https://git.kernel.org/stable/c/9f4129b6905b7d638bbc9eb8013c3989cbe30b7e","https://git.kernel.org/stable/c/2cf82b46d5e43be0dfbaac7fa1073cec2fc1f5e6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90320","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90320","identifiers":["CVE-2026-90320"]},"retained":false,"historicalAffected":[]}],"coverage":[]}