What’s Vulnerable › Vulnerabilities

CVE-2022-22822

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-10 · updated 2026-10-14
• Weakness: CWE-190

Description

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

Affected products

• Debian Linux: 10.0, 11.0
• 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; from 10.0.0 before 10.1.1 — fixed in 10.1.1, 8.15.3

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.4.3; Siemens SINEMA Remote Connect Server 3.1; Tenable Nessus 10.1.1, 8.15.3. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2022/01/17/3
• https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
• https://github.com/libexpat/libexpat/pull/539
• https://security.gentoo.org/glsa/202209-24
• https://www.debian.org/security/2022/dsa-5073
• https://www.tenable.com/security/tns-2022-05
• http://www.openwall.com/lists/oss-security/2022/01/17/3
• https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
• https://github.com/libexpat/libexpat/pull/539
• https://security.gentoo.org/glsa/202209-24
• https://www.debian.org/security/2022/dsa-5073
• https://www.tenable.com/security/tns-2022-05

Get alerted when CVE-2022-22822 or the next vulnerability affects your stack