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.

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2022-43680 · Microsoft / collected KEV context

cve-program · CVE-2022-43680

• https://github.com/libexpat/libexpat/pull/650
• https://github.com/libexpat/libexpat/issues/649
• https://github.com/libexpat/libexpat/pull/616
• https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html
• https://www.debian.org/security/2022/dsa-5266
• https://security.gentoo.org/glsa/202210-38
• 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.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS/
• 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/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR/
• https://security.netapp.com/advisory/ntap-20221118-0007/
• http://www.openwall.com/lists/oss-security/2023/12/28/5
• http://www.openwall.com/lists/oss-security/2024/01/03/5

No related operational record is retained in the current change model.