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Vulnerability · Published Jan 8, 2022 · Assigned by mitre

CVE-2022-22822

Critical 9.8

In plain English

A critical-severity integer overflow in the expat package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.5% (higher than 93% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)5.5%top 7.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

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

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8expat2.2.5-8.el8_6.2ALSA-2022:0951
AlmaLinux:8expat-devel2.2.5-8.el8_6.2ALSA-2022:0951
AlmaLinux:8xmlrpc-c1.51.0-8.el8ALSA-2022:7692
AlmaLinux:8xmlrpc-c-c++1.51.0-8.el8ALSA-2022:7692
AlmaLinux:8xmlrpc-c-client1.51.0-8.el8ALSA-2022:7692
AlmaLinux:8xmlrpc-c-client++1.51.0-8.el8ALSA-2022:7692
AlmaLinux:8xmlrpc-c-devel1.51.0-8.el8ALSA-2022:7692
Alpine:v3.20expat2.4.3-r0ALPINE-CVE-2022-22822
Alpine:v3.21expat2.4.3-r0ALPINE-CVE-2022-22822
Alpine:v3.22expat2.4.3-r0ALPINE-CVE-2022-22822
Alpine:v3.23expat2.4.3-r0ALPINE-CVE-2022-22822
Alpine:v3.24expat2.4.3-r0ALPINE-CVE-2022-22822
Debian:12expat2.4.3-1DEBIAN-CVE-2022-22822
Debian:13expat2.4.3-1DEBIAN-CVE-2022-22822
Debian:14expat2.4.3-1DEBIAN-CVE-2022-22822
Debian:12libxmltokno fix listedDEBIAN-CVE-2022-22822
Rocky Linux:8expat0:2.2.5-4.el8_5.3RLSA-2022:0951
Rocky Linux:8xmlrpc-c0:1.51.0-8.el8RLSA-2022:7692
Ubuntu:22.04:LTScadaverno fix listedUBUNTU-CVE-2022-22822
Ubuntu:24.04:LTScadaverno fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10cadaverno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.04:LTScadaverno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10cadaverno fix listedUBUNTU-CVE-2022-22822
Ubuntu:22.04:LTSexpat2.4.3-1UBUNTU-CVE-2022-22822
Ubuntu:22.04:LTSfirefox1:1snap1-0ubuntu1UBUNTU-CVE-2022-22822
Ubuntu:22.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22822
Ubuntu:24.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10matanzano fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10matanzano fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10swish-eno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10swish-eno fix listedUBUNTU-CVE-2022-22822
Ubuntu:22.04:LTStdomno fix listedUBUNTU-CVE-2022-22822
Ubuntu:24.04:LTStdomno fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10tdomno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.04:LTStdomno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10tdomno fix listedUBUNTU-CVE-2022-22822
Ubuntu:22.04:LTSthunderbird1:91.11.0+build2-0ubuntu0.22.04.1UBUNTU-CVE-2022-22822
Ubuntu:22.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22822
Ubuntu:24.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10wbxml2no fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10wbxml2no fix listedUBUNTU-CVE-2022-22822
Ubuntu:25.10xmlrpc-cno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.04:LTSxmlrpc-cno fix listedUBUNTU-CVE-2022-22822
Ubuntu:26.10xmlrpc-cno fix listedUBUNTU-CVE-2022-22822

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References