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CVE-2026-63940

KVM: SEV: Ignore Port I/O requests of length '0' PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 291bd20d5d88814a73d43b55b9428feab2f28094 before bbd3a27e4f99fdcad82d12d79c04a95dff1ff70b; affected 291bd20d5d88814a73d43b55b9428feab2f28094 before 3b6035bc6bff20e89752ce4358bc4c9a9d5883f2; affected 291bd20d5d88814a73d43b55b9428feab2f28094 before 2254972d4d69e279ba4e87bf0968eb08ad0d3c92; affected 291bd20d5d88814a73d43b55b9428feab2f28094 before c30cde934c7813b4e3069765dac64ce3d31e34f2; affected 291bd20d5d88814a73d43b55b9428feab2f28094 before 3988bd2723de407ae90fa7a6f6029b4e60238c58
Linux / Linuxaffected 5.11; unaffected 0 before 5.11; unaffected 6.6.160 through 6.6.*; unaffected 6.12.95 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.