CVE-2022-43680

high

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.

References

Advisories
More

https://www.debian.org/security/2022/dsa-5266

https://security.netapp.com/advisory/ntap-20221118-0007/

https://security.gentoo.org/glsa/202210-38

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE/

https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html

http://www.openwall.com/lists/oss-security/2024/01/03/5

http://www.openwall.com/lists/oss-security/2023/12/28/5

https://github.com/libexpat/libexpat/pull/650

https://github.com/libexpat/libexpat/pull/616

https://github.com/libexpat/libexpat/issues/649

https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-46673

https://cert-portal.siemens.com/productcert/html/ssa-892048.html

https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Details

Source: Mitre, NVD

Published: 2022-10-24

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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