{"id":"CVE-2026-98443","title":"kernel: xfs: fix cursor and pointer handling when recovering iunlink buckets (CVE-2026-98443)","summary":"A flaw was found in the Linux kernel's XFS file system. Improper pointer handling during the recovery of unlinked files can cause a use-after-free condition, where the operating system attempts to access memory after it has already been fr…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:23:06+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98443.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98443.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98443"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554894"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98443"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98443"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98443.mbox"},{"url":"https://git.kernel.org/stable/c/47a948ba653a463d429e02fda2f06a3d6b78666d"},{"url":"https://git.kernel.org/stable/c/8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1"},{"url":"https://git.kernel.org/stable/c/66a2179d02668f8df44b1a249899006f3ba38ea0"},{"url":"https://git.kernel.org/stable/c/961c717e6bf0e53c2c2b1fe4aef1add9390fedab"},{"url":"https://git.kernel.org/stable/c/65f39d09d73718611cee40399179323b5d4ead00"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00135,"epssPercentile":0.02969,"scores":{"vendor":4.4,"cna":7.8},"ingestedAt":"2026-10-18T15:45:12.306Z","slug":"CVE-2026-98443","body":"## Overview\n\nA flaw was found in the Linux kernel's XFS file system. Improper pointer handling during the recovery of unlinked files can cause a use-after-free condition, where the operating system attempts to access memory after it has already been freed. A local user capable of mounting a specially crafted file system could exploit this vulnerability during recovery operations, leading to memory corruption or a system crash resulting in a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98443.json)\n\n**kernel: xfs: fix cursor and pointer handling when recovering iunlink buckets** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\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\nOut of support scope","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229549,"id":"CVE-2026-98443","ts":1793019840883,"field":"cvss","old":"7.8","new":"4.4"},{"seq":229548,"id":"CVE-2026-98443","ts":1793019840883,"field":"severity","old":"high","new":"medium"},{"seq":228974,"id":"CVE-2026-98443","ts":1792854126165,"field":"cvss","old":null,"new":"7.8"},{"seq":228973,"id":"CVE-2026-98443","ts":1792854126165,"field":"severity","old":"none","new":"high"}]}