CVE-2022-22824: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Libexpat Project Libexpat: before 2.4.3 (fixed in 2.4.3)
• 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 2022-01-10. Last modified 2026-06-17.