{"id":"CVE-2026-98567","title":"kernel: net: xps: reject an out of range traffic class (CVE-2026-98567)","summary":"A flaw was found in the Linux kernel. A local privileged user could trigger a Denial of Service (DoS) or kernel memory corruption by causing an out-of-bounds memory write. This issue occurs in the Transmit Packet Steering (XPS) networking …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T02:46:10+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98567"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555028"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98567"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98567"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98567.mbox"},{"url":"https://git.kernel.org/stable/c/967e10f40a0c6732db299cbe001df0e859196055"},{"url":"https://git.kernel.org/stable/c/1cb8e40525a72c9f1e1cf94c68c172b3b9bbdc81"},{"url":"https://git.kernel.org/stable/c/6ea8f643053f33622f9116e4e1db58306ece45e3"},{"url":"https://git.kernel.org/stable/c/9e841723ba482d41ecbf90241c756a16cdfea949"},{"url":"https://git.kernel.org/stable/c/eff227a3cb4d0089fbb85c73480bf8abf2e5ae7f"},{"url":"https://git.kernel.org/stable/c/2cc1c3977acbffc417fb5b57699d1df3dcffb5fd"},{"url":"https://git.kernel.org/stable/c/930318290d8509e864c015fe6c9239470b3c579c"},{"url":"https://git.kernel.org/stable/c/4da3b7b8b50f3e2fde54a4c18a82a8e3f6223910"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00216,"epssPercentile":0.11996,"ingestedAt":"2026-10-18T15:45:12.259Z","slug":"CVE-2026-98567","body":"## Overview\n\nA flaw was found in the Linux kernel. A local privileged user could trigger a Denial of Service (DoS) or kernel memory corruption by causing an out-of-bounds memory write. This issue occurs in the Transmit Packet Steering (XPS) networking mechanism when traffic classes are decreased without clearing leftover entries, allowing out-of-range traffic class indexes to be accessed during queue configuration.\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 7, Red Hat Enterprise Linux 8, 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 7, Red Hat Enterprise Linux 8, … · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98567.json)\n\n**kernel: net: xps: reject an out of range traffic class** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\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\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\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":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225792,"id":"CVE-2026-98567","ts":1792498455107,"field":"cvss","old":null,"new":"5.5"},{"seq":225791,"id":"CVE-2026-98567","ts":1792498455107,"field":"severity","old":"none","new":"medium"}]}