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01 Record

CVE-2022-22823

build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

CriticalPUBLISHEDCNA: mitre
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

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.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
3.59% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 89.2% 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
Important. 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
2022-01-08 02:57Z4 YR AGO
Last updated
2026-10-14 15:16Z15 DAYS AGO
Reserved
2022-01-08
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
59e08dd5cb183d2e6b91f042f05fa371c7dda9997d6303a8838e3e6ef119a2e0

05 Affected products

VendorProductVersionsPlatforms
debiandebian_linuxNot specified—
libexpat_projectlibexpatNot specified—
redhatenterprise_linuxNot specified—
redhatjboss_core_servicesNot specified—
redhatrhel_ausNot specified—
redhatrhel_eus_long_lifeNot specified—
siemenssinema_remote_connect_serverNot specified—
tenablenessusNot specified—

06 References

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
  • xmlrpc-c
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-c++
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-client
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-client++
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-devel
    Fixed in 1.51.0-8.el8

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
  • xmlrpc-c
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-c++
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-client
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-client++
    Fixed in 1.51.0-8.el8
  • xmlrpc-c-devel
    Fixed in 1.51.0-8.el8

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 2.4.3-1
  • 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 2.4.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • expat
    Fixed in 2.4.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • cadaver
    No fix yet
  • insighttoolkit4
    No fix yet
  • matanza
    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

  • cadaver
    No fix yet
  • expat
    Fixed in 2.2.5-3ubuntu0.4
  • firefox
    Fixed in 98.0+build3-0ubuntu0.18.04.2
  • matanza
    No fix yet
  • 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

  • cadaver
    No fix yet
  • expat
    Fixed in 2.2.9-1ubuntu0.2
  • firefox
    Fixed in 98.0+build3-0ubuntu0.20.04.2
  • matanza
    No fix yet
  • tdom
    No fix yet
  • thunderbird
    Fixed in 1:91.11.0+build2-0ubuntu0.20.04.1
  • 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 2.4.3-1
  • firefox
    Fixed in 1:1snap1-0ubuntu1
  • matanza
    No fix yet
  • tdom
    No fix yet
  • thunderbird
    Fixed in 1:91.11.0+build2-0ubuntu0.22.04.1
  • 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
  • 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
  • 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
  • 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
  • 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+esm4
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • vnc4
    No fix yet
  • vtk
    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 16.04 LTS

  • ayttm
    No fix yet
  • cableswig
    No fix yet
  • coin3
    No fix yet
  • expat
    Fixed in 2.1.0-7ubuntu0.16.04.5+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • insighttoolkit
    No fix yet
  • libxmltok
    Fixed in 1.2-3ubuntu0.16.04.1~esm2
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • swish-e
    No fix yet
  • vnc4
    No fix yet
  • vtk
    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 18.04 LTS

  • coin3
    No fix yet
  • libxmltok
    Fixed in 1.2-4ubuntu0.18.04.1~esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • 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 20.04 LTS

  • libxmltok
    Fixed in 1.2-4ubuntu0.20.04.1~esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • 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 22.04 LTS

  • libxmltok
    Fixed in 1.2-4ubuntu0.22.04.1~esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • 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

  • libxmltok
    Fixed in 1.2-4.1ubuntu2.24.0.4.1+esm2
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • 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.