CVE-2026-81016 platform/x86/amd/pmc: Propagate SMU errors and validate S2D address

In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd/pmc: Propagate SMU errors and validate S2D address amdstbs2dinit discards the return value of several S2D SMU commands. When the SMU refuses a command e.g. "SMU cmd failed. err: 0xff" the failure is only noticed...

PT-2026-90146

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 7.2.6-1.1 Description An issue exists in the amd stb s2d init function where the return values of several S2D SMU commands are discarded. This leads to the masking of real errors, which are instead reported as...