CVE-2022-43680

Name: CVE-2022-43680
Creator: NVD / NIST
Published: 2022-10-24T14:15:53.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.24%

Last modified Jun 17, 2026

CVE-2022-43680 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.24% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.24%

80.6th 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
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H410c Firmware	All versions
Netapp	Active Iq Unified Manager	All versions
Netapp	Oncommand Workflow Automation	All versions
Netapp	Solidfire \& Hci Management Node	All versions
Netapp	Hci Compute Node Firmware	All versions

References

http://www.openwall.com/lists/oss-security/2023/12/28/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2024/01/03/5Mailing List, Third Party Advisory
https://github.com/libexpat/libexpat/issues/649Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/616Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/650Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00033.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202210-38Third Party Advisory
https://security.netapp.com/advisory/ntap-20221118-0007/Third Party Advisory
https://www.debian.org/security/2022/dsa-5266Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/12/28/5Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2024/01/03/5Mailing List, Third Party Advisory
https://github.com/libexpat/libexpat/issues/649Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/616Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/libexpat/libexpat/pull/650Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00033.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6/Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202210-38Third Party Advisory
https://security.netapp.com/advisory/ntap-20221118-0007/Third Party Advisory
https://www.debian.org/security/2022/dsa-5266Third Party Advisory

Timeline

Published: Oct 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-43680?

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.

How severe is CVE-2022-43680?

CVE-2022-43680 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.24% probability of exploitation in the next 30 days.

How do I fix CVE-2022-43680?

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-2022-43680?

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

Scan your code now

Source: NVD / NIST