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TI-2024-30531 Aliases CVE-2024-45491GHSA-784x-7qm2-gp97

An issue was discovered in libexpat before 2.6.3.

Priority MEDIUM 50CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 10 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0113 66th percentileScored 2026-11-07
Fix Partial Red Hat: 8 advisoriesRed Hat: 10 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*before 2.6.3Vulnerablelibexpat project
  • cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* Versions before 2.6.3 Vulnerable ·libexpat project

Remediation

Red Hat 8 advisories

  • RHSA-2024:11109 Released 2024-12-16 · Red Hat rating Low
    Updated service-interconnect rhel9 container images for 1.5
    • Red Hat Service Interconnect 1 service-interconnect/skupper-config-sync-rhel9, service-interconnect/skupper-controller-podman-container-rhel9, service-interconnect/skupper-controller-podman-rhel9 +5
  • RHSA-2024:10135 Released 2024-11-21 · Red Hat rating Low
    Updated service-interconnect rhel9 container images for 1.4 LTS
    • 9Base-Service-Interconnect-1.4 service-interconnect/skupper-config-sync-rhel9, service-interconnect/skupper-flow-collector-rhel9, service-interconnect/skupper-operator-bundle +3
  • RHSA-2024:9610 Released 2024-11-19 · Red Hat rating Moderate
    OpenShift Container Platform 4.17.5 security update
    • Red Hat OpenShift Container Platform 4.17 rhcos
Show 5 more Red Hat advisories
  • RHSA-2024:8859 Released 2024-11-05 · Red Hat rating Moderate
    xmlrpc-c security update
    • Red Hat Enterprise Linux BaseOS (v. 8) xmlrpc-c-1.51.0-10.el8_10, xmlrpc-c-client-1.51.0-10.el8_10
    • Red Hat Enterprise Linux CRB (v. 8) xmlrpc-c-c++-1.51.0-10.el8_10, xmlrpc-c-client++-1.51.0-10.el8_10, xmlrpc-c-devel-1.51.0-10.el8_10
  • RHSA-2024:7599 Released 2024-10-09 · Red Hat rating Important
    OpenShift Container Platform 4.16.16 bug fix and security update
    • Red Hat OpenShift Container Platform 4.16 openshift4/ose-installer-rhel9, openshift4/ose-monitoring-plugin-rhel9, rhcos
  • RHSA-2024:7213 Released 2024-09-26 · Red Hat rating Low
    Updated service-interconnect rhel9 container images for 1.4 LTS
    • 9Base-Service-Interconnect-1.4 service-interconnect/skupper-config-sync-rhel9, service-interconnect/skupper-flow-collector-rhel9, service-interconnect/skupper-operator-bundle +3
  • RHSA-2024:6989 Released 2024-09-24 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux BaseOS (v. 8) expat-2.2.5-15.el8_10, expat-devel-2.2.5-15.el8_10
  • RHSA-2024:6754 Released 2024-09-18 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux AppStream (v. 9) expat-devel-2.5.0-2.el9_4.1
    • Red Hat Enterprise Linux BaseOS (v. 9) expat-2.5.0-2.el9_4.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 9AffectedNo fix planned: Will not fix
9Base-Service-Interconnect-1.4Fixed RHSA-2024:10135, RHSA-2024:7213
RHOAI-2.13-RHEL-8Fixed—
RHOAI-2.14-RHEL-8Fixed—
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:6754
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:6989, RHSA-2024:8859
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:6754
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:8859
Red Hat OpenShift Container Platform 4.16Fixed RHSA-2024:7599
Red Hat OpenShift Container Platform 4.17Fixed RHSA-2024:9610
Red Hat Service Interconnect 1Fixed RHSA-2024:11109
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat JBoss Core Services
  • Red Hat OpenShift Container Platform 4.16
  • Red Hat OpenShift Container Platform 4.17

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-45491
  2. 2026-10-03 Alias added: GHSA-784x-7qm2-gp97
  3. 2026-10-30 Fix available: RHOAI-2.13-RHEL-8, RHOAI-2.14-RHEL-8 · Red Hat

References

Patch 1

Other 1

  • TI-2022-09008 In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. CVSS 3.1CRITICAL 9.8
  • TI-2026-79488 Billion laughs detection delay in libexpat enables denial of service CVSS 4.0HIGH 8.7
  • TI-2022-08947 xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert… CVSS 3.1CRITICAL 9.8
  • TI-2021-20962 In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the… CVSS 3.1HIGH 8.8
  • TI-2021-21076 In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. CVSS 3.1HIGH 8.1
  • TI-2016-00645 Expat allows context-dependent attackers to cause a denial of service (crash) or possibly… CVSS 3.1CRITICAL 9.8
See all 67 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences