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.
02 Description
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 5.08% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 92.2% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-14.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2022-01-24 01:06Z4 YR AGO
- Last updated
- 2026-10-14 15:52Z14 DAYS AGO
- Reserved
- 2022-01-24
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-190Integer Overflow or WraparoundBase
- Data version
- 5.2
- Document digest
- fd35bfd5ad45a0f250dfe2011b8fb231e08e24a927234c95c2882b216054fc59
05 Affected products
06 References
- github.comhttps://github.com/libexpat/libexpat/pull/550
- www.debian.orgDSA-5073https://www.debian.org/security/2022/dsa-5073
- lists.debian.org[debian-lts-announce] 20220307 [SECURITY] [DLA 2935-1] expat security updatehttps://lists.debian.org/debian-lts-announce/2022/03/msg00007.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
- www.tenable.comhttps://www.tenable.com/security/tns-2022-05
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20220217-0001/
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- security.gentoo.orgGLSA-202209-24https://security.gentoo.org/glsa/202209-24
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-484086.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
07 Fixed in
AlmaLinux 8
- expat Fixed in 2.2.5-8.el8_6.2
- expat-devel Fixed in 2.2.5-8.el8_6.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- expat Fixed in 2.2.5-8.el8_6.2
- expat-devel Fixed in 2.2.5-8.el8_6.2
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- expat Fixed in 2.4.3-2
- libxmltok No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- expat Fixed in 2.4.3-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- expat Fixed in 2.4.3-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- insighttoolkit4 No fix yet
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- expat Fixed in 2.2.5-3ubuntu0.4
- tdom No fix yet
- vnc4 No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- expat Fixed in 2.2.9-1ubuntu0.2
- tdom No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- cadaver No fix yet
- expat Fixed in 2.4.3-2
- firefox Fixed in 1:1snap1-0ubuntu1
- matanza No fix yet
- tdom No fix yet
- thunderbird No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- cadaver No fix yet
- matanza No fix yet
- tdom No fix yet
- thunderbird No fix yet
- wbxml2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- cadaver No fix yet
- matanza No fix yet
- swish-e No fix yet
- tdom No fix yet
- thunderbird No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- cadaver No fix yet
- matanza No fix yet
- tdom No fix yet
- thunderbird No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- cadaver No fix yet
- matanza No fix yet
- swish-e No fix yet
- tdom No fix yet
- thunderbird No fix yet
- wbxml2 No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- coin3 No fix yet
- expat Fixed in 2.1.0-4ubuntu1.4+esm4Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- vnc4 No fix yet
- vtk No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- cableswig No fix yet
- coin3 No fix yet
- expat Fixed in 2.1.0-7ubuntu0.16.04.5+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- insighttoolkit No fix yet
- vnc4 No fix yet
- vtk No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- coin3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- swish-e No fix yet
- xmlrpc-c No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 26.04 LTS
- swish-e No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.