{"id":"CVE-2026-80764","title":"kernel: Bluetooth: hci_event: fix LE list UAF on reset (CVE-2026-80764)","summary":"A flaw was found in the Linux kernel's Bluetooth subsystem. A local user could exploit a use-after-free vulnerability in the `hci_event` component. This occurs when the `hci_cc_reset()` function clears Bluetooth Low Energy (LE) lists witho…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-416","CWE-825"],"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":"2026-09-04","updated":"2026-10-25","sourceUpdated":"2026-10-25T23:59:57+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80764"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528558"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80764"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80764"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80764.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80764"},{"url":"https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed"},{"url":"https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c"},{"url":"https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621"},{"url":"https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93"},{"url":"https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6"},{"url":"https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35"},{"url":"https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00173,"epssPercentile":0.06617,"ingestedAt":"2026-10-19T10:20:54.952Z","slug":"CVE-2026-80764","body":"## Overview\n\nA flaw was found in the Linux kernel's Bluetooth subsystem. A local user could exploit a use-after-free vulnerability in the `hci_event` component. This occurs when the `hci_cc_reset()` function clears Bluetooth Low Energy (LE) lists without proper locking, allowing a debugfs reader to access freed memory. Successful exploitation could lead to memory corruption, potentially causing system instability or a denial of service.\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 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80764.json)\n\n**kernel: Bluetooth: hci_event: fix LE list UAF on reset** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-25.\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\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229449,"id":"CVE-2026-80764","ts":1793019780952,"field":"cvss","old":"5.5","new":"4.7"},{"seq":228064,"id":"CVE-2026-80764","ts":1792758066351,"field":"cvss","old":null,"new":"5.5"},{"seq":228063,"id":"CVE-2026-80764","ts":1792758066351,"field":"severity","old":"none","new":"medium"}]}