SB2026050293 - Use-after-free in Linux kernel usb class driver
Published: May 2, 2026
Security Bulletin ID
SB2026050293
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-2026-31758)
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 use-after-free in usbtmc_release when handling pending anchored URBs during device release. A local user can trigger release while anchored URBs are still pending to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7fa8f61bab3fb75b5deba8a0f3abb74dc5068d9f
- https://git.kernel.org/stable/c/8a768552f7a8276fb9e01d49773d2094ace7c8f1
- https://git.kernel.org/stable/c/959ef329071136e4335b54822fe2f607659b4569
- https://git.kernel.org/stable/c/95e09b07e50290254b28b8395509473104518f8c
- https://git.kernel.org/stable/c/977b632db51d231dec0bc571089a5c2402674139
- https://git.kernel.org/stable/c/d13318dec0c1e0e2ac16f8ecbd522db14cea4bb1
- https://git.kernel.org/stable/c/d40198de50232e04c14c6e2092e896766c95ea48
- https://git.kernel.org/stable/c/e189d443767f7cd390c52f2e122e1fc41c7562d6