CVE-2026-80971 Linux Kernel ALSA bcd2000 - Use After Free

Linux kernel ALSA bcd2000 contains a use-after-free vulnerability caused by freed URB pointers not being cleared on device disconnect, letting local attackers cause memory corruption or kernel crash, exploit requires device unplug during substream use.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ALSA bcd2000 URB pointer clearing on disconnect.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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