CVE-2025-58146
XAPI UTF-8 string handling
Description
There are multiple issues. 1. Updates to the XAPI database sanitise input strings, but try generating the notification using the unsanitised input. This causes the database's event thread to terminate and cease further processing. 2. XAPI's UTF-8 encoder implements v3.0 of the Unicode spec, but XAPI uses libraries which conform to the stricter v3.1 of the Unicode spec. This causes some strings to be accepted as valid UTF-8 by XAPI, but rejected by other libraries in use. Notably, such strings can be entered into the database, after which the database can no longer be loaded. 3. There is no input sanitisation for Map/Set updates on objects in the XAPI database.
INFO
Published Date :
July 9, 2026, 4:16 p.m.
Last Modified :
Sept. 29, 2026, 7:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | CRITICAL | 23aa2041-22e1-471f-9209-9b7396fa234f | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Sanitize all input strings before processing.
- Update libraries to conform to Unicode specifications.
- Implement input sanitization for Map/Set updates.
- Ensure consistent Unicode version compliance.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-58146.
| URL | Resource |
|---|---|
| https://xenbits.xen.org/xsa/advisory-474.html | |
| http://www.openwall.com/lists/oss-security/2025/09/09/3 | |
| http://xenbits.xen.org/xsa/advisory-474.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-58146 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-58146
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-58146 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-58146 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Sep. 29, 2026
Action Type Old Value New Value Added Translation Title: XAPI de Xen, Description: Hay múltiples problemas. 1. Las actualizaciones a la base de datos XAPI sanitizan las cadenas de entrada, pero intentan generar la notificación usando la entrada no sanitizada. Esto provoca que el hilo de eventos de la base de datos termine y cese el procesamiento posterior. 2. El codificador UTF-8 de XAPI implementa la v3.0 de la especificación Unicode, pero XAPI utiliza bibliotecas que cumplen con la v3.1 más estricta de la especificación Unicode. Esto provoca que algunas cadenas sean aceptadas como UTF-8 válido por XAPI, pero rechazadas por otras bibliotecas en uso. En particular, dichas cadenas pueden introducirse en la base de datos, después de lo cual la base de datos ya no puede cargarse. 3. No hay sanitización de entrada para actualizaciones de Map/Set en objetos en la base de datos XAPI. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 09, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-58146', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-09T16:07:50.376243Z'} -
New CVE Received by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Xen', 'product': 'XAPI', 'versions': [{'status': 'affected', 'version': 'all'}], 'platforms': ['Linux'], 'defaultStatus': 'unaffected'}] Added Description There are multiple issues. 1. Updates to the XAPI database sanitise input strings, but try generating the notification using the unsanitised input. This causes the database's event thread to terminate and cease further processing. 2. XAPI's UTF-8 encoder implements v3.0 of the Unicode spec, but XAPI uses libraries which conform to the stricter v3.1 of the Unicode spec. This causes some strings to be accepted as valid UTF-8 by XAPI, but rejected by other libraries in use. Notably, such strings can be entered into the database, after which the database can no longer be loaded. 3. There is no input sanitisation for Map/Set updates on objects in the XAPI database. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-20 Added Reference https://xenbits.xen.org/xsa/advisory-474.html -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 09, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/09/09/3 Added Reference http://xenbits.xen.org/xsa/advisory-474.html