{"id":"CVE-2026-80949","title":"kernel: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control() (CVE-2026-80949)","summary":"A flaw was found in the Linux kernel's brcmfmac Wi-Fi driver. The memory allocated for a buffer is not properly released in certain error handling paths within the `brcmf_sdio_read_control()` function. This improper memory management can l…","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-772","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T17:01:50+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80949"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532429"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80949"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80949"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80949.mbox"},{"url":"https://git.kernel.org/stable/c/b1d0a90a844abccdfed9fe141b5d0d654a821485"},{"url":"https://git.kernel.org/stable/c/86b57fa3172e287bc083113507a965e6d9a46a45"},{"url":"https://git.kernel.org/stable/c/a732c4f36a4cd79f3702391f88ebb56f2e43b0ee"},{"url":"https://git.kernel.org/stable/c/7704f6ba2a8c492b07a3eaa1e311b4b30d389246"},{"url":"https://git.kernel.org/stable/c/fdb880a7d575efe8b5c7b5b819b96d9251a3937f"},{"url":"https://git.kernel.org/stable/c/261d7c7610b4b2f476382c88a2d1ae0cc5e07add"},{"url":"https://git.kernel.org/stable/c/ba04715ee672c336272be3ceb43bda9ffc33eb75"},{"url":"https://git.kernel.org/stable/c/0d10db8e94fcb23a799789aaa696b4d8f937e207"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00176,"epssPercentile":0.07424,"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80949","body":"## Overview\n\nA flaw was found in the Linux kernel's brcmfmac Wi-Fi driver. The memory allocated for a buffer is not properly released in certain error handling paths within the `brcmf_sdio_read_control()` function. This improper memory management can lead to a memory leak, potentially causing system instability or a denial of service (DoS) due to resource exhaustion.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, 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 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80949.json)\n\n**kernel: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()** — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\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\nNo fix planned:\n\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\nNot affected:\n\n- Red Hat Enterprise Linux 6\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":204250,"id":"CVE-2026-80949","ts":1789490240620,"field":"cvss","old":null,"new":"5.5"},{"seq":204249,"id":"CVE-2026-80949","ts":1789490240620,"field":"severity","old":"none","new":"medium"},{"seq":147255,"id":"CVE-2026-80949","ts":1789270204787,"field":"cvss","old":null,"new":"5.3"},{"seq":147254,"id":"CVE-2026-80949","ts":1789270204787,"field":"severity","old":"none","new":"medium"},{"seq":109012,"id":"CVE-2026-80949","ts":1789183729947,"field":"cvss","old":null,"new":"5.3"},{"seq":109011,"id":"CVE-2026-80949","ts":1789183729947,"field":"severity","old":"none","new":"medium"}]}