PT-2026-61257 · Linux+1 · Linux Kernel+1
CVE-2026-63940
·
Published
2026-07-19
·
Updated
2026-09-07
CVSS v4.0
9.4
Critical
| Vector | AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
An issue exists in the KVM SEV component where Port I/O requests with a length or count of
0 were not explicitly ignored. This could lead to length underflow when setting up the software scratch area or other related code. The fix ensures that requests with a length of 0 are ignored and allows for warnings when attempting to configure the scratch area with a length of 0.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Related Identifiers
Affected Products
Linux Kernel
Ubuntu