SB2026100750 - Use-after-free in Linux kernel usb bcd2000

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Main Vulnerability Database SB2026100750

SB2026100750 - Use-after-free in Linux kernel usb bcd2000

Published: October 7, 2026

Security Bulletin ID SB2026100750
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-98316)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a use-after-free in kernel memory.

The vulnerability exists due to a use-after-free caused by a race condition in the ALSA bcd2000 USB driver when handling USB disconnect concurrently with rawmidi operations. A local user can cause a rawmidi trigger callback to overlap with USB disconnect handling to trigger a use-after-free in kernel memory.

An in-flight function such as bcd2000_midi_send() can continue accessing a USB request block (URB) during disconnect handling.


Remediation

Install update from vendor's website.

References