Is CVE-2022-40674 in the CISA KEV catalog?

No. CVE-2022-40674 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-40674?

CVE-2022-40674 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2022-40674?

CVE-2022-40674 has an EPSS score of 1.66% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-40674?

Upgrade expat on debian 11 to 2.2.10-2+deb11u4 or later. Fixes are available for 15 affected products.

CVE & CISA-KEV Catalog

CVE-2022-40674

HIGHEPSS 74th pctl

8.1

CVSS v3

NVD

Description

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

CWE-416Use After Free

How to fix

Remediation Available

expatDebian

Fixed in:2.2.10-2+deb11u4CVE-2022-40674

Fixed in:2.4.8-2CVE-2022-40674

mingw-expatRocky

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw-expatRed Hat / RHEL

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw32-expatRocky

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw32-expatRed Hat / RHEL

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw32-expat-debuginfoRed Hat / RHEL

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw32-expat-debuginfoRocky

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw64-expatRed Hat / RHEL

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw64-expatRocky

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw64-expat-debuginfoRocky

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

mingw64-expat-debuginfoRed Hat / RHEL

Fixed in:0:2.4.8-2.el8RHSA-2023:3068

expatUbuntu

Fixed in:2.1.0-4ubuntu1.4+esm7USN-5638-4

Fixed in:2.1.0-7ubuntu0.16.04.5+esm6USN-5638-1

Fixed in:2.2.5-3ubuntu0.8USN-5638-2

Fixed in:2.2.9-1ubuntu0.5USN-5638-2

Fixed in:2.4.7-1ubuntu0.1USN-5638-2

firefoxUbuntu

Fixed in:107.0+build2-0ubuntu0.18.04.1USN-5726-1

Fixed in:107.0+build2-0ubuntu0.20.04.1USN-5726-1

lib64expat1Ubuntu

Fixed in:2.1.0-7ubuntu0.16.04.5+esm6USN-5638-1

libexpat1Ubuntu

Fixed in:2.1.0-4ubuntu1.4+esm7USN-5638-4

Fixed in:2.1.0-7ubuntu0.16.04.5+esm6USN-5638-1

Fixed in:2.2.5-3ubuntu0.8USN-5638-2

Fixed in:2.2.9-1ubuntu0.5USN-5638-2

Fixed in:2.4.7-1ubuntu0.1USN-5638-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.66%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

Third-Party Advisory5

Other references5

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-30.