SB2026091684 - Use-after-free in Linux kernel gadget function driver
Published: September 16, 2026
Security Bulletin ID
SB2026091684
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90022)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to execute arbitrary code, disclose sensitive information, or cause a denial of service.
The vulnerability exists due to use-after-free in the f_midi2 string attribute show path when concurrently reading and writing string attributes. A local user can concurrently access and modify string attributes to execute arbitrary code, disclose sensitive information, or cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/49fab5e1bdb205c36c965d0e9677bc40d282d3a2
- https://git.kernel.org/stable/c/d11f3300b39e2daad2f0d9d66ddcc39a156cb594
- https://git.kernel.org/stable/c/e89e30f0b5d3004fe5955250bd8b04f3733e32ce
- https://git.kernel.org/stable/c/f9bdf4c4f6410a1dfafafa383a0e21069372657f
- https://git.kernel.org/stable/c/fed0aa7c6eaedc6c0d4e362fc91724aa47be4a7b