Go to homepageCyberStrike

Menu

Star on GitHub · 3.3k
Sign inDownload

CVE-2023-53996

9.3 · CRITICAL

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,…

Published Dec 24, 2025EPSS 0.11%

Overview

CVE-2023-53996 is a critical-severity vulnerability. It was published on December 24, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/6615212d8e131b45bd9705b0d69cc0d2f624666fRefgit.kernel.org/stable/c/8ae7457e71a320867d868f2622d7c643596e4f43Refgit.kernel.org/stable/c/ac3f9c9f1b37edaa7d1a9b908bc79d843955a1a2Refgit.kernel.org/stable/c/ba50e7773a99a109a1ea6f753b766a080d3b21cc

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53996?

CVE-2023-53996 is a critical-severity vulnerability. It was published on December 24, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2023-53996?

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-53996?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-53996?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53996 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related CRITICAL CVEs from 2023

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
LiveWatch live →