CVE-2022-25235: Debian Linux

Critical severity, CVSS 9.8. EPSS: 5% chance of exploitation in the next 30 days.

xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Libexpat Project Libexpat: before 2.4.5 (fixed in 2.4.5)
• Oracle HTTP Server: version 12.2.1.3.0 only; version 12.2.1.4.0 only
• Oracle ZFS Storage Appliance Kit: version 8.8 only
• Siemens Sinema Remote Connect Server: before 3.1 (fixed in 3.1)

Published 2022-02-16. Last modified 2026-06-17.