SB2026091836 - Out-of-bounds read in Linux kernel powerplay hwmgr driver
Published: September 18, 2026
Security Bulletin ID
SB2026091836
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-93179)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service or trigger an out-of-bounds read.
The vulnerability exists due to improper validation of voltage-object sizes in the AMD PowerPlay VoltageObjectInfo table lookup routines when processing a malformed VBIOS VoltageObjectInfo table. A local user can cause the driver to process a malformed VoltageObjectInfo table to cause a denial of service or trigger an out-of-bounds read.
Remediation
Install update from vendor's website.