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CVE-2026-23554

7.8 · HIGH

The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is dropped, so that multiple modifications done under the same locked region only issue a…

Published Mar 23, 2026CWE-367EPSS 0.13%

Overview

CVE-2026-23554 is a high-severity vulnerability. It was published on March 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The Intel EPT paging code uses an optimization to defer flushing of any cached

EPT state until the p2m lock is dropped, so that multiple modifications done

under the same locked region only issue a single flush.

Freeing of paging structures however is not deferred until the flushing is

done, and can result in freed pages transiently being present in cached state.

Such stale entries can point to memory ranges not owned by the guest, thus

allowing access to unintended memory regions.

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

Refxenbits.xenproject.org/xsa/advisory-480.htmlRefwww.openwall.com/lists/oss-security/2026/03/17/6Refxenbits.xen.org/xsa/advisory-480.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23554?

CVE-2026-23554 is a high-severity vulnerability. It was published on March 23, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23554?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23554?

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-2026-23554?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23554 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.

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