CVE-2026-63940 | BDVDB-2026-349632 Detail
LinuxLinux
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.
Weaknesses#
- CWE-190 Integer Overflow or Wraparound
References#
- https://git.kernel.org/stable/c/c8aa0a79ab0b23cde4c46ccff78e63be35733e04
- https://git.kernel.org/stable/c/bbd3a27e4f99fdcad82d12d79c04a95dff1ff70b
- https://git.kernel.org/stable/c/3b6035bc6bff20e89752ce4358bc4c9a9d5883f2
- https://git.kernel.org/stable/c/2254972d4d69e279ba4e87bf0968eb08ad0d3c92
- https://git.kernel.org/stable/c/c30cde934c7813b4e3069765dac64ce3d31e34f2
- https://git.kernel.org/stable/c/3988bd2723de407ae90fa7a6f6029b4e60238c58
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.