{"id":"CVE-2026-80934","title":"kernel: wifi: mt76: mt7996: fix TX DMA mapping leak for AddBA req frames (CVE-2026-80934)","summary":"A flaw was found in the Linux kernel's mt76: mt7996 Wi-Fi driver. The driver incorrectly manages Direct Memory Access (DMA) mappings when processing AddBA request frames, causing a continuous leak of these mappings. Over time, this resourc…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-771","vendor":"Red Hat","product":"Linux","affected":["Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 < 01f2e0da8548f82d704b65b513026cfedc5f8962","Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 < b754d3a6d44c53d9853eba374d8a7ef279a9d00a","Linux >= cb6ebbdffef2a888b95f121637cd1fad473919c6 < deaa2e3656937fbbe312f0ee2616c756c6e2511f","Linux 91a5a48702e948e45df01a4f2fd54a0b0d0d6efb","Linux >= 6.17.8 < 6.18","Linux 6.18"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T14:48:28+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80934"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532169"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80934"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80934"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80934.mbox"},{"url":"https://git.kernel.org/stable/c/01f2e0da8548f82d704b65b513026cfedc5f8962"},{"url":"https://git.kernel.org/stable/c/b754d3a6d44c53d9853eba374d8a7ef279a9d00a"},{"url":"https://git.kernel.org/stable/c/deaa2e3656937fbbe312f0ee2616c756c6e2511f"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00166,"epssPercentile":0.06254,"ingestedAt":"2026-09-14T00:35:28.532Z","slug":"CVE-2026-80934","body":"## Overview\n\nA flaw was found in the Linux kernel's mt76: mt7996 Wi-Fi driver. The driver incorrectly manages Direct Memory Access (DMA) mappings when processing AddBA request frames, causing a continuous leak of these mappings. Over time, this resource exhaustion can lead to a Denial of Service (DoS) for the Wi-Fi functionality and other integrated components.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80934.json)\n\n**kernel: wifi: mt76: mt7996: fix TX DMA mapping leak for AddBA req frames** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nNot affected:\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\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":202765,"id":"CVE-2026-80934","ts":1789403715793,"field":"cvss","old":null,"new":"5.5"},{"seq":202764,"id":"CVE-2026-80934","ts":1789403715793,"field":"severity","old":"none","new":"medium"},{"seq":147652,"id":"CVE-2026-80934","ts":1789270211748,"field":"cvss","old":null,"new":"5.3"},{"seq":147651,"id":"CVE-2026-80934","ts":1789270211748,"field":"severity","old":"none","new":"medium"},{"seq":109410,"id":"CVE-2026-80934","ts":1789183731806,"field":"cvss","old":null,"new":"5.3"},{"seq":109409,"id":"CVE-2026-80934","ts":1789183731806,"field":"severity","old":"none","new":"medium"}]}