CVE-2022-23990: Debian Linux

High severity, CVSS 7.5. EPSS: 4% chance of exploitation in the next 30 days.

Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function.

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 2.4.4 (fixed in 2.4.4)
• Oracle Communications Metasolv Solution: version 6.3.1 only
• Siemens Sinema Remote Connect Server: before 3.1 (fixed in 3.1)
• Tenable Nessus: before 8.15.3 (fixed in 8.15.3); from 10.0.0, before 10.1.1 (fixed in 10.1.1)

Published 2022-01-26. Last modified 2026-06-17.