CVE-2026-62434 - Vulnerability Details - OpenCVE

Description

A guest started with Populated on Demand enabled (PoD) can attempt to
reclaim pages which aren't regular guest RAM. This can cause corruption
of memory management state in Xen.

Published: 2026-07-28

Score: 5.3 Medium

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Xen

Xen

unknown

Version	Status	Constraints
`consult Xen advisory XSA-507`	unknown	—

No data.

No data.

No data available yet.

Remediation

Vendor Workaround

Running only PV guests or HVM/PVH guests without PoD will avoid the vulnerability.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://xenbits.xenproject.org/xsa/advisory-507.html

History

Tue, 28 Jul 2026 16:15:00 +0000

Type	Values Removed	Values Added
Description		A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen.
Title		PoD: Don't try to reclaim special pages
Weaknesses		CWE-787
References		https://xenbits.xenproject.org/xsa/advisory-507.html
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: XEN

Published: 2026-07-28T12:33:08.540Z

Updated: 2026-07-28T16:33:34.668Z

Reserved: 2026-07-14T10:28:12.655Z

Link: CVE-2026-62434

Vulnrichment

Updated: 2026-07-28T16:33:34.668Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-787
Out-of-bounds Write

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