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Vulnerability · Published Jan 8, 2022 · Assigned by mitre

CVE-2022-22827

High 8.8

In plain English

A high-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 3.2% (higher than 88% 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)8.8High
Exploit odds (30 days)3.2%top 11.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

storeAtts 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-2022-22827
Alpine:v3.21expat2.4.3-r0ALPINE-CVE-2022-22827
Alpine:v3.22expat2.4.3-r0ALPINE-CVE-2022-22827
Alpine:v3.23expat2.4.3-r0ALPINE-CVE-2022-22827
Alpine:v3.24expat2.4.3-r0ALPINE-CVE-2022-22827
Debian:12expat2.4.3-1DEBIAN-CVE-2022-22827
Debian:13expat2.4.3-1DEBIAN-CVE-2022-22827
Debian:14expat2.4.3-1DEBIAN-CVE-2022-22827
Debian:12libxmltokno fix listedDEBIAN-CVE-2022-22827
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-2022-22827
Ubuntu:24.04:LTScadaverno fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10cadaverno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.04:LTScadaverno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10cadaverno fix listedUBUNTU-CVE-2022-22827
Ubuntu:22.04:LTSexpat2.4.3-1UBUNTU-CVE-2022-22827
Ubuntu:22.04:LTSfirefox1:1snap1-0ubuntu1UBUNTU-CVE-2022-22827
Ubuntu:22.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22827
Ubuntu:24.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10matanzano fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.04:LTSmatanzano fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10matanzano fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10swish-eno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10swish-eno fix listedUBUNTU-CVE-2022-22827
Ubuntu:22.04:LTStdomno fix listedUBUNTU-CVE-2022-22827
Ubuntu:24.04:LTStdomno fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10tdomno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.04:LTStdomno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10tdomno fix listedUBUNTU-CVE-2022-22827
Ubuntu:22.04:LTSthunderbird1:91.11.0+build2-0ubuntu0.22.04.1UBUNTU-CVE-2022-22827
Ubuntu:22.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22827
Ubuntu:24.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10wbxml2no fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.04:LTSwbxml2no fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10wbxml2no fix listedUBUNTU-CVE-2022-22827
Ubuntu:25.10xmlrpc-cno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.04:LTSxmlrpc-cno fix listedUBUNTU-CVE-2022-22827
Ubuntu:26.10xmlrpc-cno fix listedUBUNTU-CVE-2022-22827

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:R/S:U/C:H/I:H/A:H

References