Use After Free The advisory has been revoked - it doesn't affect any version of package expat (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL9-EXPAT-11180003
- published29 Jul 2025
- disclosed14 Sept 2022
Introduced: 14 Sep 2022
CVE-2022-40674 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by RHEL.
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.
References
- https://access.redhat.com/security/cve/CVE-2022-40674
- https://access.redhat.com/errata/RHSA-2022:6838
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSVZN3IJ6OCPSJL7AEX3ZHSHAHFOGESK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J2IGJNHFV53PYST7VQV3T4NHVYAMXA36/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LQB6FJAM5YQ35SF5B2MN25Y2FX56EOEZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WE2ZKEPGFCZ7R6DRVH3K6RBJPT42ZBEG/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGBVQQ47URGJAZWHCISHDWF6QBTV2LE/
- https://github.com/libexpat/libexpat/pull/629
- https://github.com/libexpat/libexpat/pull/640
- https://lists.debian.org/debian-lts-announce/2022/09/msg00029.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GSVZN3IJ6OCPSJL7AEX3ZHSHAHFOGESK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J2IGJNHFV53PYST7VQV3T4NHVYAMXA36/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LQB6FJAM5YQ35SF5B2MN25Y2FX56EOEZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WE2ZKEPGFCZ7R6DRVH3K6RBJPT42ZBEG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGBVQQ47URGJAZWHCISHDWF6QBTV2LE/
- https://security.gentoo.org/glsa/202209-24
- https://security.gentoo.org/glsa/202211-06
- https://security.netapp.com/advisory/ntap-20221028-0008/
- https://www.debian.org/security/2022/dsa-5236