CVE-2022-43680
HIGH 7.5EPSS 2.5%
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.
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 2.46% chance of exploitation in the next 30 days, 84th percentile
- Published
- 2022-10-24
- Updated
- 2026-10-14
Proof-of-concept exploits (3)
- Nivaskumark/external_expat_AOSP10_r33_CVE-2022-436800★ · 2023-04-04
- Trinadh465/external_expat-2.1.0_CVE-2022-436800★ · 2022-12-15
- nidhihcl/external_expat_2.1.0_CVE-2022-436800★ · 2022-12-19
Security advisories
- http://www.openwall.com/lists/oss-security/2023/12/28/5
- http://www.openwall.com/lists/oss-security/2024/01/03/5
- libexpat/libexpat/pull/616
- https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/…
- https://security.gentoo.org/glsa/202210-38
- https://security.netapp.com/advisory/ntap-20221118-0007
- https://www.debian.org/security/2022/dsa-5266