What’s Vulnerable › Vulnerabilities

CVE-2022-40674

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-14 · updated 2026-10-14
• Weakness: CWE-416

Description

libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.

Affected products

• Debian Linux: 10.0, 11.0
• Fedoraproject Fedora: 35, 36, 37
• libexpat project libexpat: before 2.4.9 — fixed in 2.4.9

How to fix

Upgrade to a fixed version: libexpat project libexpat 2.4.9. Check the vendor advisory for mitigations.

References

• 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

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