CVE-2022-40674

Name: CVE-2022-40674
Creator: NVD / NIST
Published: 2022-09-14T11:15:54.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.66%

Last modified Jun 17, 2026

CVE-2022-40674 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.. EPSS estimates a 1.66% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.66%

73.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libexpat Project	Libexpat	< 2.4.9
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36
Fedoraproject	Fedora	37

References

https://github.com/libexpat/libexpat/pull/629Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/640Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00029.htmlIssue Tracking, Third Party Advisory
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/202209-24Third Party Advisory
https://security.gentoo.org/glsa/202211-06Third Party Advisory
https://security.netapp.com/advisory/ntap-20221028-0008/Third Party Advisory
https://www.debian.org/security/2022/dsa-5236Third Party Advisory
https://github.com/libexpat/libexpat/pull/629Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/640Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00029.htmlIssue Tracking, Third Party Advisory
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/202209-24Third Party Advisory
https://security.gentoo.org/glsa/202211-06Third Party Advisory
https://security.netapp.com/advisory/ntap-20221028-0008/Third Party Advisory
https://www.debian.org/security/2022/dsa-5236Third Party Advisory

Timeline

Published: Sep 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-40674?

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

How severe is CVE-2022-40674?

CVE-2022-40674 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.

How do I fix CVE-2022-40674?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-40674?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST