SB20260918162 - NULL pointer dereference in Linux kernel gadget function driver
Published: September 18, 2026
Security Bulletin ID
SB20260918162
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) NULL pointer dereference (CVE-ID: CVE-2026-93056)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the f_uac1_legacy configfs string attribute store handler when writing to the fn_play, fn_cap, or fn_cntl attribute during a memory-allocation failure. A local user can write to an affected configfs attribute while memory allocation fails to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/021b58ac3e58cffa68ed9585ff492a19e98414f6
- https://git.kernel.org/stable/c/2ed25c9d4400cf90d9201657963a231c27a5ea57
- https://git.kernel.org/stable/c/590d74ec8f488e06b9f1c0f8f0941f45531f3a55
- https://git.kernel.org/stable/c/6351ba62778f72dc4f6bc18bfa99e618829cff0d
- https://git.kernel.org/stable/c/745adfe6c337f3d5d7737d57529d14a208151b45
- https://git.kernel.org/stable/c/8b9335aec93975bb9186d63993a5a610e5066ffc
- https://git.kernel.org/stable/c/977659adb341f6e30fb00dcf183f63f29df879e2
- https://git.kernel.org/stable/c/fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7