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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…
High7.5EPSS 3.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Timeline
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.2% · top 12% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (17)
- https://github.com/libexpat/libexpat/pull/650 (opens in a new tab)x_transferred
- https://github.com/libexpat/libexpat/issues/649 (opens in a new tab)x_transferred
- https://github.com/libexpat/libexpat/pull/616 (opens in a new tab)x_transferred
- [debian-lts-announce] 20221028 [SECURITY] [DLA 3165-1] expat security update (opens in a new tab)mailing-listx_transferred
- DSA-5266 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202210-38 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-ae2559a8f4 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-3cf0e7ebc7 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-f3a939e960 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-5f1e2e9016 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-49db80f821 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2022-c43235716e (opens in a new tab)vendor-advisoryx_transferred
- https://security.netapp.com/advisory/ntap-20221118-0007/ (opens in a new tab)x_transferred
- [oss-security] 20231228 CVE-2022-43680: Apache OpenOffice: "Use after free" fixed in libexpat (opens in a new tab)mailing-listx_transferred
- [oss-security] 20240103 CVE-2022-43680: Apache OpenOffice: "Use after free" fixed in libexpat (opens in a new tab)mailing-listx_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-892048.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-43680)Record last updated .