Is CVE-2022-43680 in the CISA KEV catalog?

No. CVE-2022-43680 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-43680?

CVE-2022-43680 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-43680?

CVE-2022-43680 has an EPSS score of 2.24% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-43680?

Upgrade expat on debian 11 to 2.2.10-2+deb11u5 or later. Fixes are available for 12 affected products.

CVE & CISA-KEV Catalog

CVE-2022-43680

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

Description

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

CWE-416Use After Free

How to fix

Remediation Available

expatDebian

Fixed in:2.2.10-2+deb11u5CVE-2022-43680

Fixed in:2.5.0-1CVE-2022-43680

expatRocky

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expatRed Hat / RHEL

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

expat-debuginfoRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expat-debuginfoRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

expat-debugsourceRocky

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

expat-debugsourceRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

expat-develRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expat-develRed Hat / RHEL

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.5-8.el8_6.4RHSA-2024:0421

expatUbuntu

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

Fixed in:2.1.0-7ubuntu0.16.04.5+esm7USN-5638-3

Fixed in:2.2.5-3ubuntu0.9USN-5638-3

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

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

Fixed in:2.2.9-1ubuntu0.6USN-5638-3

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

Fixed in:2.4.7-1ubuntu0.2USN-5638-3

Fixed in:2.4.8-2ubuntu0.22.10.1USN-5638-3

lib64expat1Ubuntu

Fixed in:2.1.0-7ubuntu0.16.04.5+esm7USN-5638-3

libexpat1Ubuntu

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

Fixed in:2.1.0-7ubuntu0.16.04.5+esm7USN-5638-3

Fixed in:2.2.5-3ubuntu0.9USN-5638-3

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

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

Fixed in:2.2.9-1ubuntu0.6USN-5638-3

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

Fixed in:2.4.7-1ubuntu0.2USN-5638-3

Fixed in:2.4.8-2ubuntu0.22.10.1USN-5638-3

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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.24%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch3

Third-Party Advisory12

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.