Detections
Analytics
CVE-2026-63940
critical
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Ignore Port I/O requests of length '0' Explicitly ignore Port I/O requests of length '0' (or count '0'), so that setting up the software scratch area (and other code) doesn't have to worry about underflowing the length, and to allow for WARNing on trying to configure the scratch area with len==0.
References
https://git.kernel.org/stable/c/c30cde934c7813b4e3069765dac64ce3d31e34f2
https://git.kernel.org/stable/c/3b6035bc6bff20e89752ce4358bc4c9a9d5883f2
https://git.kernel.org/stable/c/3988bd2723de407ae90fa7a6f6029b4e60238c58
https://git.kernel.org/stable/c/2254972d4d69e279ba4e87bf0968eb08ad0d3c92