{"id":"CVE-2026-98543","revision":"e5c65e32fea14bfcb8fd6172bbd2036e","records":[{"revision":"e5c65e32fea14bfcb8fd6172bbd2036e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98543","aliases":[],"title":"bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir\n\nbpf_lsm_has_d_inode_locked() makes the verifier rewrite\nbpf_[set|remove]_dentry_xattr() to the _locked variants, which assume\nthat the caller already holds the inode's i_rwsem.  The path_unlink and\npath_rmdir hooks are listed, but security_path_unlink() and\nsecurity_path_rmdir() run before vfs_unlink()/vfs_rmdir() take the\nvictim inode's i_rwsem, so a sleepable BPF LSM program attached to\neither hook mutates the victim's xattrs without the lock held.\n\nDrop the two path hooks from d_inode_locked_hooks so that the verifier\nkeeps the locking bpf_[set|remove]_dentry_xattr() variants, which take\nthe lock themselves.","state":0,"publishedAt":"2026-10-18T15:18:10.823+00:00","modifiedAt":"2026-10-19T09:21:26.563+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/bpf_fs_kfuncs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"56467292794b800164df20c076c409ac548e56ec\",\n                            \"lessThan\": \"7504b677c4370c9e4b153c553ff8831c093b1ff6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"56467292794b800164df20c076c409ac548e56ec\",\n                            \"lessThan\": \"640d37fbd34d03af727dbc567f48c0203d1de6b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"56467292794b800164df20c076c409ac548e56ec\",\n                            \"lessThan\": \"35d442ed1f86465e49df3119fb898f985186db13\",\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/bpf_fs_kfuncs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\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":[],"references":["https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6","https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4","https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98543","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98543","identifiers":["CVE-2026-98543"]},"retained":false,"historicalAffected":[]}],"coverage":[]}