{"id":"CVE-2026-98823","title":"kernel: wifi: cfg80211: preserve hidden-group beacon IE ownership (CVE-2026-98823)","summary":"A flaw was found in the Linux kernel's cfg80211 wireless subsystem. This issue allows an adjacent attacker within wireless range to cause a Denial of Service (DoS) by crashing the system. During a channel switch, the kernel improperly mana…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-1341","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T20:25:33+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98823.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98823.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98823"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555230"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98823"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98823"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98823.mbox"},{"url":"https://git.kernel.org/stable/c/5617d5328839003c91007ce906b4f100b43926e9"},{"url":"https://git.kernel.org/stable/c/49b66110a08e4f926f6393e938f226de2750a08b"},{"url":"https://git.kernel.org/stable/c/dd7973a4130b0862be38d7e08cc0e874b3d99967"},{"url":"https://git.kernel.org/stable/c/5f27581c176f84b52ec0ab9be7b500c10667ef60"},{"url":"https://git.kernel.org/stable/c/cc45f313d85533d647ce619326302aad6f797c14"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00175,"epssPercentile":0.06975,"ingestedAt":"2026-10-18T16:47:32.473Z","slug":"CVE-2026-98823","body":"## Overview\n\nA flaw was found in the Linux kernel's cfg80211 wireless subsystem. This issue allows an adjacent attacker within wireless range to cause a Denial of Service (DoS) by crashing the system. During a channel switch, the kernel improperly manages memory ownership when merging wireless scan entries that borrow beacon information elements (IEs). Releasing these entries can result in a double-free condition, leading to kernel memory corruption.\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 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 8, Red Hat Enterprise Linux 9, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98823.json)\n\n**kernel: wifi: cfg80211: preserve hidden-group beacon IE ownership** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\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 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228645,"id":"CVE-2026-98823","ts":1792844830223,"field":"cvss","old":null,"new":"5.3"},{"seq":228644,"id":"CVE-2026-98823","ts":1792844830223,"field":"severity","old":"none","new":"medium"}]}