{"id":"CVE-2026-98827","title":"kernel: wifi: ath9k_htc: bound TX aggregation to MAX_TX_BUF_SIZE (CVE-2026-98827)","summary":"A flaw was found in the Linux kernel's ath9k_htc wireless network driver. An attacker transmitting large network packets can trigger a Denial of Service (DoS) or system crash through memory corruption. This issue occurs because the driver …","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-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":"2026-10-23","sourceUpdated":"2026-10-23T20:50:43+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98827.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98827.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98827"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555243"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98827"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98827"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98827.mbox"},{"url":"https://git.kernel.org/stable/c/c18882768a0fe253c70986c5fe66d9241570fbc4"},{"url":"https://git.kernel.org/stable/c/345ce265cf604e84b5b560c21beaf4c6f269ab14"},{"url":"https://git.kernel.org/stable/c/e73a619f91b6cfec47bc1a94aea28df6849e5be3"},{"url":"https://git.kernel.org/stable/c/aeaca27c1db3106967ffbb2b517d98c835f6d500"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.002,"epssPercentile":0.09732,"ingestedAt":"2026-10-18T16:47:32.472Z","slug":"CVE-2026-98827","body":"## Overview\n\nA flaw was found in the Linux kernel's ath9k_htc wireless network driver. An attacker transmitting large network packets can trigger a Denial of Service (DoS) or system crash through memory corruption. This issue occurs because the driver limits aggregated transmit packets only by count rather than cumulative data size, causing a buffer overflow when copying oversized network frames into a fixed-size buffer.\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-2026-98827.json)\n\n**kernel: wifi: ath9k_htc: bound TX aggregation to MAX_TX_BUF_SIZE** — 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":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228641,"id":"CVE-2026-98827","ts":1792844828689,"field":"cvss","old":null,"new":"5.3"},{"seq":228640,"id":"CVE-2026-98827","ts":1792844828689,"field":"severity","old":"none","new":"medium"}]}