Use-after-free in Linux kernel - CVE-2026-80971
Published: September 12, 2026
Vulnerability identifier: #VU149419
CSH Severity: Low
CVSS v4: 1 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80971
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an attacker with physical access to cause a use-after-free condition.
The vulnerability exists due to use-after-free in the ALSA bcd2000 driver's URB handling when a BCD2000 USB device is disconnected while a rawmidi substream remains open. An attacker with physical access can disconnect the device while the substream remains open to cause a use-after-free condition.
Affected software
Linux kernel
How to mitigate CVE-2026-80971
Install security update from vendor's repository.