SB2026101599 - Use-after-free in Linux kernel usb 6fire
Published: October 15, 2026
Security Bulletin ID
SB2026101599
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98428)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free in the kernel.
The vulnerability exists due to improper lifetime management of reference-counted USB request blocks in the ALSA USB 6fire driver when releasing embedded USB request blocks asynchronously. A local user can exercise the affected URB release paths to trigger a use-after-free in the kernel.
The affected URBs are embedded in structures used for PCM, MIDI, and communication.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3ef9093d83ffecb8e5f6c9d5769a52d39df74f7a
- https://git.kernel.org/stable/c/52a43c2d57e774489ac3fbbac06ff02f19bd9a52
- https://git.kernel.org/stable/c/8b8559aeaba2e51cfee1779b2383b085991f7d81
- https://git.kernel.org/stable/c/999f433c09e4668412bd68ca207ae2b4af863862
- https://git.kernel.org/stable/c/9fe49dbc023e82dfaee7b245997d820d01742a9a
- https://git.kernel.org/stable/c/d181434549b3da668110a25d743848cce9897f4e