{"id":"CVE-2026-98543","title":"kernel: bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir (CVE-2026-98543)","summary":"A flaw was found in the Linux kernel. A local privileged user could cause a Denial of Service (DoS) or file system corruption due to improper locking in the BPF (Berkeley Packet Filter) subsystem. When attaching sleepable BPF programs to c…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-413","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:23:40+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98543.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98543.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98543"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554949"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98543"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98543"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98543.mbox"},{"url":"https://git.kernel.org/stable/c/7504b677c4370c9e4b153c553ff8831c093b1ff6"},{"url":"https://git.kernel.org/stable/c/640d37fbd34d03af727dbc567f48c0203d1de6b4"},{"url":"https://git.kernel.org/stable/c/35d442ed1f86465e49df3119fb898f985186db13"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00154,"epssPercentile":0.04462,"scores":{"vendor":4.1,"cna":7.3},"ingestedAt":"2026-10-18T15:45:12.266Z","slug":"CVE-2026-98543","body":"## Overview\n\nA flaw was found in the Linux kernel. A local privileged user could cause a Denial of Service (DoS) or file system corruption due to improper locking in the BPF (Berkeley Packet Filter) subsystem. When attaching sleepable BPF programs to certain file removal hooks, the kernel verifier incorrectly assumes an inode lock is held, permitting extended attributes to be modified concurrently without synchronization.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98543.json)\n\n**kernel: bpf: fs/xattr: don't assume the inode is locked in path_unlink/path_rmdir** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229517,"id":"CVE-2026-98543","ts":1793019831994,"field":"cvss","old":"7.3","new":"4.1"},{"seq":229516,"id":"CVE-2026-98543","ts":1793019831994,"field":"severity","old":"high","new":"medium"},{"seq":228924,"id":"CVE-2026-98543","ts":1792854111929,"field":"cvss","old":null,"new":"7.3"},{"seq":228923,"id":"CVE-2026-98543","ts":1792854111929,"field":"severity","old":"none","new":"high"}]}