CVE-2022-22822

CRITICAL LAB

libexpat < 2.4.3 - Integer Overflow in addBinding

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2022-22822. PoCs published by nanopathi.

AI-analyzed exploit summary This repository appears to be a snapshot of the Expat library (version 2.2.6) with no explicit exploit code or proof-of-concept for CVE-2022-22822. The files are standard library and build configuration files.

Description

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

Exploits (1)

nomisec STUB
by nanopathi · poc
https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2022-22822toCVE-2022-22827

This repository appears to be a snapshot of the Expat library (version 2.2.6) with no explicit exploit code or proof-of-concept for CVE-2022-22822. The files are standard library and build configuration files.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: Expat (libexpat) 2.2.6
No auth needed
Prerequisites: None
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/libexpat/libexpat/pull/539
Mailing List, Release Notes, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2022/01/17/3
Third Party Advisory x_refsource_confirm
https://www.tenable.com/security/tns-2022-05
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2022/dsa-5073
Patch, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202209-24

Scores

CVSS v3 9.8
EPSS 0.0483
EPSS Percentile 90.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Lab Environment

COMMUNITY
Community Lab
docker pull composer:1.7.2

Details

CWE
CWE-190
Status published
Products (5)
debian/debian_linux 10.0
debian/debian_linux 11.0
libexpat_project/libexpat < 2.4.3
siemens/sinema_remote_connect_server < 3.1
tenable/nessus < 8.15.3
Published Jan 10, 2022
Tracked Since Feb 18, 2026