Xen Shadow Mode Tracing buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.1$5k-$25k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Xen. The affected element is an unknown function of the component Shadow Mode Tracing. This manipulation causes buffer overflow. This vulnerability is tracked as CVE-2025-58150. The attack is possible to be carried out remotely. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in Xen (the affected version is unknown). It has been declared as very critical. Affected by this vulnerability is an unknown code of the component Shadow Mode Tracing. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing. Some of these variables are written to with guest controlled data, of guest controllable size. That size can be larger than the variable, and bounding of the writes was missing.

The advisory is shared at xenbits.xen.org. This vulnerability is known as CVE-2025-58150. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/10/2026).

The vulnerability scanner Nessus provides a plugin with the ID 296777 (Linux Distros Unpatched Vulnerability : CVE-2025-58150), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at Tenable (296777) and CERT Bund (WID-SEC-2026-0225). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Fedora Linux
  • SUSE Linux
  • Open Source Xen
  • Citrix Systems XenServer

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.3
VulDB Meta Temp Score: 9.1

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 8.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 296777
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-58150

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/27/2026 Advisory disclosed
01/27/2026 +0 days VulDB entry created
02/10/2026 +14 days VulDB entry last update

Sourcesinfo

Advisory: xenbits.xen.org
Status: Confirmed

CVE: CVE-2025-58150 (🔒)
GCVE (CVE): GCVE-0-2025-58150
GCVE (VulDB): GCVE-100-342997
CERT Bund: WID-SEC-2026-0225 - Xen: Mehrere Schwachstellen

Entryinfo

Created: 01/27/2026 14:15
Updated: 02/10/2026 11:13
Changes: 01/27/2026 14:15 (50), 01/27/2026 14:30 (7), 01/28/2026 19:20 (2), 01/29/2026 00:06 (1), 01/29/2026 07:24 (1), 01/29/2026 16:43 (1), 02/10/2026 11:13 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

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