VDB-323603 · CVE-2025-58143 · EUVD-2025-28911

Xen Reference TSC Page race condition

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Xen. It has been rated as problematic. Impacted is an unknown function of the component Reference TSC Page. The manipulation leads to race condition. This vulnerability is listed as CVE-2025-58143. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Xen (version unknown). It has been rated as problematic. This issue affects an unknown function of the component Reference TSC Page. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. The impact remains unknown. The summary by CVE is:

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] There are multiple issues related to the handling and accessing of guest memory pages in the viridian code: 1. A NULL pointer dereference in the updating of the reference TSC area. This is CVE-2025-27466. 2. A NULL pointer dereference by assuming the SIM page is mapped when a synthetic timer message has to be delivered. This is CVE-2025-58142. 3. A race in the mapping of the reference TSC page, where a guest can get Xen to free a page while still present in the guest physical to machine (p2m) page tables. This is CVE-2025-58143.

It is possible to read the advisory at xenbits.xen.org. The identification of this vulnerability is CVE-2025-58143. The exploitation is known to be difficult. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 264553 (Citrix XenServer Multiple Vulnerabilities (XSA-472)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org.

The vulnerability is also documented in the databases at Tenable (264553), EUVD (EUVD-2025-28911) and CERT Bund (WID-SEC-2025-2007). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Debian Linux
Fedora Linux
SUSE Linux
SUSE openSUSE
Open Source Xen

Productinfo

Type

Virtualization Software

Name

License

open-source

CPE 2.3info

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CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 264553
Nessus Name: Citrix XenServer Multiple Vulnerabilities (XSA-472)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: xenbits.xen.org

Timelineinfo

09/11/2025 Advisory disclosed
09/11/2025 +0 days VulDB entry created
01/07/2026 +118 days VulDB entry last update

Sourcesinfo

Advisory: xenbits.xen.org
Status: Confirmed

CVE: CVE-2025-58143 (🔒)
GCVE (CVE): GCVE-0-2025-58143
GCVE (VulDB): GCVE-100-323603
EUVD: 🔒
CERT Bund: WID-SEC-2025-2007 - Xen: Mehrere Schwachstellen

Entryinfo

Created: 09/11/2025 07:04
Updated: 01/07/2026 07:20
Changes: 09/11/2025 07:04 (50), 09/11/2025 16:53 (1), 09/11/2025 17:53 (1), 09/12/2025 09:42 (2), 01/07/2026 07:20 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.