CVE-2026-31590

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

Description An issue exists in the KVM SEV component where the sev pin memory() function triggers a warning when the number of pages overflows an integer. This can be easily triggered from userspace by calling the 'KVM MEMORY ENCRYPT REG REGION' endpoint with a large value in the size variable. Additionally, checks in sev mem enc register region() regarding the addr and size variables are ineffective because they are defined as u64s in a 64-bit environment.

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