CVE-2026-23554 is a high-severity use-after-free vulnerability (CWE-367) in the Intel EPT paging code, primarily affecting Xen virtualization environments. This flaw allows stale cached EPT entries to point to unowned memory, potentially granting unauthorized access to unintended memory regions. Rated 7.8 HIGH, exploitation requires local access and high attack complexity, but could lead to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, nor are public exploit codes available. However, vendors like SUSE have released security updates, indicating awareness and mitigation efforts.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.17CPE matchmatch criteria | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.