SB20260912358 - Unchecked Return Value in Linux kernel amd pmc driver
Published: September 12, 2026
Security Bulletin ID
SB20260912358
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Unchecked Return Value (CVE-ID: CVE-2026-81016)
CWE-ID: CWE-252 - Unchecked Return Value
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger an ioremap-on-RAM warning.
The vulnerability exists due to unchecked return values in amd_stb_s2d_init() when handling S2D SMU physical-address queries. A local user can cause physical address zero to be passed to devm_ioremap() to trigger an ioremap-on-RAM warning.
The condition is associated with the spill-to-DRAM feature's separate SMU message port.
Remediation
Install update from vendor's website.