CVE-2022-23852
expat: Expat (aka libexpat) before 2.4.4 has a signed integer overflow inXML_GetBuffer, for configurations with a nonzero XM...
CVE-2022-23852 is fixed in 7 products on 1 platform, first by expat 2.4.3-2, released January 23, 2022. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
9.8
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0508
92nd percentile
Expat (aka libexpat) before 2.4.4 has a signed integer overflow inXML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| expat · Debian 12.15 (bookworm) | 2.4.3-2 | DEBIAN-CVE-2022-23852 | Jan 24, 2022 |
| expat · Debian 13.5 (trixie) | 2.4.3-2 | DEBIAN-CVE-2022-23852 | Jan 24, 2022 |
| expat · Debian 14 | 2.4.3-2 | DEBIAN-CVE-2022-23852 | Jan 24, 2022 |
| expat · RHEL 8 | 0:2.2.5-4.el8_5.3 | RHSA-2022:0951 | Mar 16, 2022 |
| expat · RHEL 9 | 0:2.2.10-12.el9_0 | RHBA-2022:4046 | May 17, 2022 |
| expat · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | expat 2.2.5-3ubuntu0.4 | Feb 14, 2022 |
| expat · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | expat 2.2.9-1ubuntu0.2 | Feb 14, 2022 |
| expat · Ubuntu 22.04.1 LTS (jammy) | 2.4.3-2 | expat 2.4.3-2 | Jan 23, 2022 |
| expat · Ubuntu 24.10 (oracular) | 2.4.3-2 | expat 2.4.3-2 | Jan 16, 2026 |
| expat · Ubuntu 25.04 (plucky) | 2.4.3-2 | expat 2.4.3-2 | Jan 16, 2026 |
| expat · almalinux 8 | 2.2.5-8.el8_6.2 | ALSA-2022:0951 | Mar 16, 2022 |
| expat · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat · ol 8 | 0:2.2.5-4.el8_5.3 | ELSA-2022-0951 | Mar 16, 2022 |
| expat · rocky 8 | 0:2.2.5-4.el8_5.3 | RLSA-2022:0951 | Mar 16, 2022 |
| expat-debuginfo · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-debugsource · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-devel · RHEL 8 | 0:2.2.5-4.el8_5.3 | RHSA-2022:0951 | Mar 16, 2022 |
| expat-devel · RHEL 9 | 0:2.2.10-12.el9_0 | RHBA-2022:4046 | May 17, 2022 |
| expat-devel · almalinux 8 | 2.2.5-8.el8_6.2 | ALSA-2022:0951 | Mar 16, 2022 |
| expat-devel · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| expat-devel · ol 8 | 0:2.2.5-4.el8_5.3 | ELSA-2022-0951 | Mar 16, 2022 |
| expat-static · amzn 2023 | 2.5.0-1.amzn2023.0.2 | ALAS2023-2023-058 | Feb 17, 2023 |
| firefox · Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Apr 6, 2022 |
| firefox · Ubuntu 24.10 (oracular) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Feb 15, 2022 |
| firefox · Ubuntu 25.04 (plucky) | 1:1snap1-0ubuntu1 | firefox 1:1snap1-0ubuntu1 | Feb 15, 2022 |
| libexpat1 · Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.4 | libexpat1 2.2.5-3ubuntu0.4 | Feb 14, 2022 |
| libexpat1 · Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.2 | libexpat1 2.2.9-1ubuntu0.2 | Feb 14, 2022 |
| libexpat1 · Ubuntu 22.04.1 LTS (jammy) | 2.4.3-2 | libexpat1 2.4.3-2 | Jan 23, 2022 |
| libexpat1 · Ubuntu 24.10 (oracular) | 2.4.3-2 | libexpat1 2.4.3-2 | Jan 16, 2026 |
| libexpat1 · Ubuntu 25.04 (plucky) | 2.4.3-2 | libexpat1 2.4.3-2 | Jan 16, 2026 |
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