CVE-2022-22822
criticaladdBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
Vendor / product: Libexpat Project — libexpat
addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2022-01-10 14:12
Modified: 2026-10-14 16:17
NVD status: Modified
Last synced 2 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
libexpat_project / libexpat <2.4.3
tenable / nessus <8.15.3, ≥10.0.0 <10.1.1
siemens / sinema_remote_connect_server <3.1
debian / debian_linux 10.0, 11.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Patch / mitigation: https://github.com/libexpat/libexpat/pull/539
Patch / mitigation: https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Patch / mitigation: https://github.com/libexpat/libexpat/pull/539
References
- http://www.openwall.com/lists/oss-security/2022/01/17/3 cve@mitre.org
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf cve@mitre.org
- https://github.com/libexpat/libexpat/pull/539 cve@mitre.org
- https://security.gentoo.org/glsa/202209-24 cve@mitre.org
- https://www.debian.org/security/2022/dsa-5073 cve@mitre.org
- https://www.tenable.com/security/tns-2022-05 cve@mitre.org
- http://www.openwall.com/lists/oss-security/2022/01/17/3 af854a3a-2127-422b-91ae-364da2661108
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf af854a3a-2127-422b-91ae-364da2661108
- https://github.com/libexpat/libexpat/pull/539 af854a3a-2127-422b-91ae-364da2661108
- https://security.gentoo.org/glsa/202209-24 af854a3a-2127-422b-91ae-364da2661108
- https://www.debian.org/security/2022/dsa-5073 af854a3a-2127-422b-91ae-364da2661108
- https://www.tenable.com/security/tns-2022-05 af854a3a-2127-422b-91ae-364da2661108
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- https://cert-portal.siemens.com/productcert/html/ssa-484086.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗