Use After Free in Libexpat Project
CVE-2022-40674
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.022 (82.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: +0.000
Affected products
- Libexpat Project
- Debian Linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libexpat/libexpat/pull/629 (Patch, Third Party Advisory, Issue Tracking)
- github.com/libexpat/libexpat/pull/640 (Patch, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2022/dsa-5236 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/09/msg00029.html (mailing-list, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/202209-24 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20221028-0008/ (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-40674?
- CVE-2022-40674 is a high-severity vulnerability in Libexpat Project, classified under Use After Free. CVSS score: 8.1/10. Published 2022-09-14.
- How severe is CVE-2022-40674?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2022-40674 known to be exploited?
- 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.