CVE-2025-58146 PUBLISHED

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.

• This issue was discovered by Edwin Török from XenServer. finder

• https://xenbits.xen.org/xsa/advisory-474.html

• CWE-20 Improper input validation CWE

• CAPEC-272 Protocol Manipulation