SB2026052868 - Use-after-free in Linux kernel usb caiaq
Published: May 28, 2026
Security Bulletin ID
SB2026052868
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-46004)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in the caiaq driver setup_card() error handling when probing the device. A local user can trigger a probe error to cause a denial of service.
The issue occurs because execution continues after freeing the sound card during certain error paths.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5
- https://git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f
- https://git.kernel.org/stable/c/6251e3e256337a30160ef59ab1580dde4d1acd28
- https://git.kernel.org/stable/c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056
- https://git.kernel.org/stable/c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd