CVE-2026-31482

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the s390 architecture where the r12 register is not properly cleared during kernel entry. Previously, entry handlers loaded r12 with the current task pointer for use by branch prediction macros. After the removal of TIF ISOLATE BP, the load operation was removed, but the register was not added to the clearing sequence, leading to inconsistent register scrubbing across entry points.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.