AUGUST 4, 2026
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Case File

CVE-2023-53996

CRITICAL · CVSS 9.3 EPSS 0.12%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-12-24 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.3. It affects Linux.

CVE
CVE-2023-53996
Severity
CRITICAL
CVSS
9.3
EPSS
0.12%
Linux

Original NVD 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.