Use-after-free in Linux kernel - CVE-2026-80764
Published: September 6, 2026
Vulnerability identifier: #VU147159
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80764
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in the Bluetooth HCI event handler's LE accept and resolving list handling when a debugfs reader accesses a list entry concurrently with reset completion. A local user can read Bluetooth LE lists through debugfs while reset completion frees a current list entry to trigger a use-after-free condition.
Exploitation requires a concurrent reset completion and read access to the relevant debugfs entries.
Affected software
Linux kernel
How to mitigate CVE-2026-80764
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/0628cc9b2fa29985a7b8c774741f8a736b0f5e7c
- https://git.kernel.org/stable/c/25b05e3ce31d954540e99954bcc66cbceb27ab35
- https://git.kernel.org/stable/c/33af47e847fe4a28b109673affb5874015d54f5a
- https://git.kernel.org/stable/c/39a3afb91be3cb465f46ce7a8e5696d9e33edf93
- https://git.kernel.org/stable/c/8e68c380290b1dd64a0a512ce66d0264130c46ed
- https://git.kernel.org/stable/c/b55e83a4ba31d40deae22d4e4dc8c84083e953c6
- https://git.kernel.org/stable/c/d57702d4c55633c243da5a2fec37ae2ad4adb621