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Unrated severityNVD Advisory· Published Dec 24, 2025· Updated Apr 15, 2026

CVE-2023-53996

CVE-2023-53996

Description

In the Linux kernel, the following vulnerability has been resolved:

x86/sev: Make enc_dec_hypercall() accept a size instead of npages

enc_dec_hypercall() accepted a page count instead of a size, which forced its callers to round up. As a result, non-page aligned vaddrs caused pages to be spuriously marked as decrypted via the encryption status hypercall, which in turn caused consistent corruption of pages during live migration. Live migration requires accurate encryption status information to avoid migrating pages from the wrong perspective.

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Affected products

138

Patches

Vulnerability mechanics

References

4

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