CVE-2026-62434

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

28/07/2026

Last modified:

28/07/2026

Description

A guest started with Populated on Demand enabled (PoD) can attempt to<br /> reclaim pages which aren&#39;t regular guest RAM. This can cause corruption<br /> of memory management state in Xen.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

Base Score 3.x

5.30

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://xenbits.xenproject.org/xsa/advisory-507.html
http://www.openwall.com/lists/oss-security/2026/07/28/23
http://xenbits.xen.org/xsa/advisory-507.html