SB2026021898 - Improper locking in Linux kernel swsmu smu14 driver
Published: February 18, 2026
Security Bulletin ID
SB2026021898
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) Improper locking (CVE-ID: CVE-2026-23213)
CWE-ID: CWE-667 - Improper Locking
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 perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the smu_v14_0_2_mode1_reset() function in drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.