Integer overflow in Libexpat Project
CVE-2022-23852
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.051 (92.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.051 · change: +0.005
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/libexpat/libexpat/pull/550 (Patch, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2022/dsa-5073 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/03/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Third Party Advisory)
- www.tenable.com/security/tns-2022-05 (Third Party Advisory)
- security.netapp.com/advisory/ntap-20220217-0001/ (Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf (Third Party Advisory)
- security.gentoo.org/glsa/202209-24 (vendor-advisory, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2022-23852?
- CVE-2022-23852 is a critical-severity vulnerability in Libexpat Project, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2022-01-24.
- How severe is CVE-2022-23852?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-23852 known to be exploited?
- 17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.