Vulnerability Report

CVE-2026-23554

Title: Intel EPT Paging Information Disclosure

Arbitrary File Access

Proof Of Concept

No public PoC currently indexed for CVE-2026-23554.

CWE Category NVD-CWE-noinfo

Published Date Mar 23, 2026

Modified Date Apr 10, 2026

Exploit Status Not Found

Score 7.8 CVSS v

Exploit Probability (EPSS)

0.13%

Vulnerability Summary

CVE-2026-23554: 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.

Impacted Vendors

xensource_inc 1

xen 1

Reference Links

https://xenbits.xenproject.org/xsa/advisory-480.html

CVSS v3.1

Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0

Severity HIGH

7.8

Attack Vector

LOCAL

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

RAW VECTOR CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns