SB20260912398 - Use-after-free in Linux kernel usb bcd2000
Published: September 12, 2026
Security Bulletin ID
SB20260912398
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-80971)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.