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Fencer Vulns
critical 9.8

CVE-2024-45490 json

An issue was discovered in libexpat before 2.6.3

published 2024-08-30 2 y ago modified 2026-10-15 25 d ago also EUVD-2024-41509 , JLSEC-2025-62

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

An issue was discovered in libexpat before 2.6.3. xmlparse.c does not reject a negative length for XML_ParseBuffer.

Patch / fix

  • julia Expat_jll 2.6.4+0
  • libexpat_project libexpat 2.6.3
  • Siemens RUGGEDCOM RST2428P V3.1
  • Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family V3.1
  • expat Debian 12 2.5.0-1+deb12u1
  • expat Debian 14, Debian 13 2.6.2-2

debian advisories DEBIAN-CVE-2024-45490

  • expat Ubuntu 20.04 LTS 2.2.9-1ubuntu0.7
  • expat Ubuntu 22.04 LTS 2.4.7-1ubuntu0.4
  • expat Ubuntu 24.04 LTS 2.6.1-2ubuntu0.1
  • expat Ubuntu Pro 14.04 LTS 2.1.0-4ubuntu1.4+esm9
  • expat Ubuntu Pro 16.04 LTS 2.1.0-7ubuntu0.16.04.5+esm9
  • expat Ubuntu Pro 18.04 LTS 2.2.5-3ubuntu0.9+esm1
  • libxmltok Ubuntu Pro 16.04 LTS 1.2-3ubuntu0.16.04.1~esm4
  • libxmltok Ubuntu Pro 18.04 LTS 1.2-4ubuntu0.18.04.1~esm3

ubuntu advisories UBUNTU-CVE-2024-45490

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • expat RHEL 8 2.2.5-15.el8_10
  • expat RHEL 9 2.5.0-2.el9_4.1

red hat advisories RHSA-2024:6989RHSA-2024:6754

  • mozjs60 SLE Module for Desktop Applications 15 SP7, SLE Module for Basesystem 15 SP7, SLE Micro 5.4 +3 more 60.9.0-150200.6.8.1
  • mozjs52 SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 52.6.0-150000.3.9.1
  • expat Linux Micro 6.1 2.7.1-slfo.1.1_1.1
  • expat Linux Micro 6.0 2.7.1-1.1
  • expat Linux Micro 6.0 2.5.0-3.1
  • mozjs78 SLE Module for Package Hub 15 SP6, SLE Module for Package Hub 15 SP5, SLE Module for Desktop Applications 15 SP5 +2 more 78.15.0-150400.3.6.2
  • mozjs115 SLE Module for Desktop Applications 15 SP6, openSUSE Leap 15.6 115.4.0-150600.3.3.1
  • expat SLE Micro 5.2, SLE Micro 5.1 2.2.5-150000.3.30.1

suse advisories SUSE-SU-2026:0044-1SUSE-SU-2025:4512-1SUSE-SU-2025:20311-1SUSE-SU-2025:20207-1SUSE-SU-2025:20045-1SUSE-SU-2024:3554-1

  • mozjs115 openSUSE Tumbleweed 115.4.0-5.1
  • mozjs128 openSUSE Tumbleweed 128.2.0-2.1
  • mozjs78 openSUSE Tumbleweed 78.15.0-5.1
  • x3270 openSUSE Tumbleweed 4.3-4.1
  • expat openSUSE Tumbleweed 2.6.3-1.1

opensuse advisories openSUSE-SU-2024:14379-1openSUSE-SU-2024:14380-1openSUSE-SU-2024:14381-1openSUSE-SU-2024:14328-1openSUSE-SU-2024:14322-1

  • expat AlmaLinux 8 2.2.5-15.el8_10
  • expat AlmaLinux 9 2.5.0-2.el9_4.1

almalinux advisories ALSA-2024:6989ALSA-2024:6754

  • expat Rocky Linux 9 2.5.0-2.el9_4.1
  • expat Rocky Linux 8 2.2.5-15.el8_10

rocky linux advisories RLSA-2024:6754RLSA-2024:6989

  • expat Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 2.6.3-r0
  • qt5-qtwebengine Alpine 3.20 5.15.16-r12
  • qt5-qtwebengine Alpine 3.23, Alpine 3.22, Alpine 3.21 5.15.17-r3
  • qt6-qtwebengine Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 6.7.2-r6

alpine advisories ALPINE-CVE-2024-45490

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • expat CBL-Mariner 2.0, Azure Linux 3.0 2.6.3-1

azure linux advisories AZL-48369AZL-48372

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-45490 updated cvss 7.5

libexpat: Negative Length Parsing Vulnerability in libexpat

  • Red Hat Enterprise Linux 6 expat, compat-expat1 Red Hat Enterprise Linux 7 expat, firefox, thunderbird
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 firefox, mingw-expat, thunderbird, mingw32-expat, mingw64-expat Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 10 expat
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) expat-devel 2.5.0-2.el9_4.1, expat-debuginfo 2.5.0-2.el9_4.1, expat-debugsource 2.5.0-2.el9_4.1
    fixed: vendor fix RHSA-2024:6754
  • Red Hat Enterprise Linux BaseOS (v. 8) expat 2.2.5-15.el8_10
    fixed: vendor fix RHSA-2024:6989
  • Red Hat Enterprise Linux BaseOS (v. 9) expat 2.5.0-2.el9_4.1
    fixed: vendor fix RHSA-2024:6754
  • Red Hat JBoss Core Services 2.4.62
    fixed: vendor fix RHSA-2025:3453
  • Red Hat OpenShift AI 8 rhoai/odh-rhel8-operator v2.13.1-2, rhoai/odh-dashboard-rhel8 v2.13.1-1, rhoai/odh-modelmesh-rhel8 v2.13.1-1, rhoai/odh-operator-bundle v2.13.1-2, rhoai/odh-rhel8-operator v2.14.0-24, rhoai/odh-dashboard-rhel8 v2.14.0-11, +56 more
    fixed: vendor fix RHBA-2024:8413
show 5 more
  • Red Hat OpenShift Container Platform 4.16 rhcos 416.94.202410020522-0
    fixed: vendor fix RHSA-2024:7599
  • Red Hat OpenShift Container Platform 4.17 rhcos 417.94.202411070820-0
    fixed: vendor fix RHSA-2024:9610
  • Red Hat Service Interconnect 1 service-interconnect/skupper-router-rhel9 2.5.3-6, service-interconnect/skupper-operator-bundle 1.5.5-4, service-interconnect/skupper-config-sync-rhel9 1.5.5-4, service-interconnect/skupper-flow-collector-rhel9 1.5.5-4, service-interconnect/skupper-site-controller-rhel9 1.5.5-4, service-interconnect/skupper-controller-podman-rhel9 1.5.5-4, +2 more
    fixed: vendor fix RHSA-2024:11109
  • Red Hat Service Interconnect 1.4 service-interconnect/skupper-router-rhel9 2.4.3-6, service-interconnect/skupper-router-rhel9 2.4.3-7, service-interconnect/skupper-operator-bundle 1.4.7-2, service-interconnect/skupper-operator-bundle 1.4.7-4, service-interconnect/skupper-config-sync-rhel9 1.4.7-2, service-interconnect/skupper-config-sync-rhel9 1.4.7-3, +6 more
    fixed: vendor fix RHSA-2024:7213
  • Red Hat Enterprise Linux 8 xmlrpc-c, xmlrpc-c-c++, xmlrpc-c-client, xmlrpc-c-client++ Red Hat OpenShift Container Platform 4.16 openshift4/ose-cli-rhel9 v4.16.0-202410011135.p0.gc44c839.assembly.stream.el9, openshift4/ose-pod-rhel9 v4.16.0-202410011135.p0.g632b078.assembly.stream.el9, openshift4/ose-sdn-rhel9 v4.16.0-202410011135.p0.g807fca2.assembly.stream.el9, openshift4/ose-etcd-rhel9 v4.16.0-202410011135.p0.g16202ec.assembly.stream.el9, openshift4/ose-tests-rhel9 v4.16.0-202410011135.p0.g06403d4.assembly.stream.el9, openshift4/ose-tools-rhel9 v4.16.0-202410011135.p0.gc44c839.assembly.stream.el9, +185 more Red Hat OpenShift Container Platform 4.17 openshift4/ose-pod-rhel9 v4.17.0-202411070335.p0.g82afd77.assembly.stream.el9, openshift4/ose-ironic-rhel9 v4.17.0-202411080105.p0.g073486f.assembly.stream.el9, openshift4/network-tools-rhel9 v4.17.0-202411120003.p0.g8e170b4.assembly.stream.el9, openshift4/ose-hyperkube-rhel9 v4.17.0-202411070335.p0.g82afd77.assembly.stream.el9, openshift4/ose-installer-rhel9 v4.17.0-202411071809.p0.ga7efddc.assembly.stream.el9, openshift4/ose-hypershift-rhel9 v4.17.0-202411121505.p0.g64cb7fd.assembly.stream.el9, +23 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-25-259-02 updated cvss 6.5

Hitachi Energy RTU500 Series

  • Hitachi Energy RTU500 series CMU Firmware vers:RTU500_series_CMU_Firmware/>=13.7.1, <=13.7.6
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-162-05 updated cvss 9.8

Siemens SIMATIC S7-1500 CPU family

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.5
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-226-15 updated cvss 9.8

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.1 Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family < 3.1
    affected: fixed in V3.1 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
    not affected

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-24-317-01 updated cvss 9.8

Subnet Solutions PowerSYSTEM Center

  • Subnet Solutions PowerSYSTEM Center PSC 2020 <=v5.22.x
    affected: mitigation “Subnet Solutions inc. reports that dependencies have been updated and vulnerabilities are to be addressed in PowerSYSTEM Center 2020 Update 23 release.” support.microsoft.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Expat_jll
<2.6.4+0
2.6.4+0

Affected products

  • libexpat_project libexpat
  • Siemens RUGGEDCOM RST2428P
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
  • Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.