{"id":"CVE-2026-98822","title":"kernel: wifi: mac80211: prevent AP VLAN tx from other interfaces (CVE-2026-98822)","summary":"A flaw was found in the Linux kernel's mac80211 wireless subsystem. This flaw can lead to information disclosure across network boundaries when transmitting frames across Access Point (AP) virtual local area networks (VLANs). Due to improp…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cvssSource":"vendor","cwe":"CWE-941","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-2026-98822.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98822.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98822"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555256"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98822"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98822"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98822.mbox"},{"url":"https://git.kernel.org/stable/c/2fe08c8ff26841430a3c98ab755337325b5d47b5"},{"url":"https://git.kernel.org/stable/c/fd875e24e8f2b202e3636b3ef8e6060874eca0e5"},{"url":"https://git.kernel.org/stable/c/88e96d902efeefbffc34450969f40dc61a0c8a42"},{"url":"https://git.kernel.org/stable/c/ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0"},{"url":"https://git.kernel.org/stable/c/7f93ca31f7fd9b42e7d692f59514436d448ac908"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.10959,"ingestedAt":"2026-10-18T16:47:32.474Z","slug":"CVE-2026-98822","body":"## Overview\n\nA flaw was found in the Linux kernel's mac80211 wireless subsystem. This flaw can lead to information disclosure across network boundaries when transmitting frames across Access Point (AP) virtual local area networks (VLANs). Due to improper station lookup logic, the kernel matches recipient devices across the entire wireless network rather than restricting the search to the originating interface. Consequently, unintended devices on a separate VLAN can receive sensitive unicast network traffic, bypassing network segmentation.\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-2026-98822.json)\n\n**kernel: wifi: mac80211: prevent AP VLAN tx from other interfaces** — 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":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228649,"id":"CVE-2026-98822","ts":1792844831238,"field":"cvss","old":null,"new":"4.3"},{"seq":228648,"id":"CVE-2026-98822","ts":1792844831238,"field":"severity","old":"none","new":"medium"}]}