{"id":"CVE-2026-98829","title":"kernel: wifi: mac80211: drop oversized fragments to avoid extra_len overflow (CVE-2026-98829)","summary":"A flaw was found in the mac80211 wireless networking subsystem of the Linux kernel. An adjacent attacker, such as a rogue Wi-Fi access point or nearby malicious device, can cause a Denial of Service (DoS) by transmitting a sequence of over…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-190","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":"2026-10-23T21:05:32+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98829.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98829.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98829"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555196"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98829"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98829"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98829.mbox"},{"url":"https://git.kernel.org/stable/c/9338b2dea74cb0fc80a4c958b68e687610ba2261"},{"url":"https://git.kernel.org/stable/c/870b8cb9baa9bd859deceb33ae158011e6ba2360"},{"url":"https://git.kernel.org/stable/c/5e4f3509793b4db2c0835340224743db680e861f"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00166,"epssPercentile":0.05773,"ingestedAt":"2026-10-18T16:47:32.471Z","slug":"CVE-2026-98829","body":"## Overview\n\nA flaw was found in the mac80211 wireless networking subsystem of the Linux kernel. An adjacent attacker, such as a rogue Wi-Fi access point or nearby malicious device, can cause a Denial of Service (DoS) by transmitting a sequence of oversized wireless frame fragments. This causes an integer overflow during frame reassembly, leading to an undersized buffer allocation and an immediate system crash.\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-2026-98829.json)\n\n**kernel: wifi: mac80211: drop oversized fragments to avoid extra_len overflow** — 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":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228634,"id":"CVE-2026-98829","ts":1792844824782,"field":"cvss","old":null,"new":"6.5"},{"seq":228633,"id":"CVE-2026-98829","ts":1792844824782,"field":"severity","old":"none","new":"medium"}]}