{"id":"CVE-2026-98828","title":"kernel: wifi: ath9k: reject short WMI command responses (CVE-2026-98828)","summary":"A flaw was found in the Linux kernel's ath9k wireless driver. When handling Wireless Module Interface (WMI) command responses, the driver copies data into a response buffer without verifying that the received message is sufficiently long. …","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","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":"2026-10-23","sourceUpdated":"2026-10-23T20:50:56+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98828.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98828.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98828"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555205"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98828"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98828"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98828.mbox"},{"url":"https://git.kernel.org/stable/c/03ef61d05aa26022327f971b790f07e6bf6e35d6"},{"url":"https://git.kernel.org/stable/c/e0c21130c1c7791ba73b19a3a9ea767c8cd43745"},{"url":"https://git.kernel.org/stable/c/a3b0137c855a61371d9cf9993b8bcc33c9798202"},{"url":"https://git.kernel.org/stable/c/93ce8ea70451e800601bc9444aa33043de15d67b"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.002,"epssPercentile":0.0973,"ingestedAt":"2026-10-18T16:47:32.472Z","slug":"CVE-2026-98828","body":"## Overview\n\nA flaw was found in the Linux kernel's ath9k wireless driver. When handling Wireless Module Interface (WMI) command responses, the driver copies data into a response buffer without verifying that the received message is sufficiently long. A malicious or compromised device can return a truncated response to trigger an out-of-bounds read beyond the allocated packet buffer. This issue can result in a Denial of Service (DoS) due to a system crash or potentially lead to information disclosure.\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 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98828.json)\n\n**kernel: wifi: ath9k: reject short WMI command responses** — 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 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":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228637,"id":"CVE-2026-98828","ts":1792844826426,"field":"cvss","old":null,"new":"6.2"},{"seq":228636,"id":"CVE-2026-98828","ts":1792844826426,"field":"severity","old":"none","new":"medium"}]}