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TI-2023-28773 Aliases CVE-2023-52425GHSA-gh68-jm46-84rf

libexpat through 2.5.0 allows a denial of service (resource consumption) because many…

Priority MEDIUM 43CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 13 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02149 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 10 advisoriesRed Hat: 13 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:*:*:*:*:*:*:*:*up to 2.5.0Vulnerablelibexpat project
  • cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* Versions up to 2.5.0 Vulnerable ·libexpat project

Remediation

Red Hat 10 advisories

  • RHSA-2025:22871 Released 2025-12-09 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) expat-2.2.10-1.el8_2
  • RHSA-2025:22785 Released 2025-12-04 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) expat-2.2.10-1.el8_4
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) expat-2.2.10-1.el8_4
  • RHSA-2025:22035 Released 2025-11-25 · Red Hat rating Important
    expat security update
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) expat-2.2.10-12.el9_0.4
Show 7 more Red Hat advisories
  • RHSA-2025:3453 Released 2025-04-02 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 security update
    • Red Hat JBoss Core Services 2.4.62
  • RHSA-2024:4259 Released 2024-07-02 · Red Hat rating Moderate
    xmlrpc-c security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) xmlrpc-c-1.51.0-9.el8_10, xmlrpc-c-client-1.51.0-9.el8_10
    • Red Hat Enterprise Linux CRB (v. 8) xmlrpc-c-c++-1.51.0-9.el8_10, xmlrpc-c-client++-1.51.0-9.el8_10, xmlrpc-c-devel-1.51.0-9.el8_10
  • RHSA-2024:3926 Released 2024-06-13 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.2) expat-devel-2.5.0-1.el9_2.1
    • Red Hat Enterprise Linux BaseOS EUS (v.9.2) expat-2.5.0-1.el9_2.1
  • RHSA-2024:2839 Released 2024-05-14 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) expat-2.2.5-8.el8_6.5, expat-devel-2.2.5-8.el8_6.5
  • RHSA-2024:2575 Released 2024-04-30 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.8) expat-2.2.5-11.el8_8.2, expat-devel-2.2.5-11.el8_8.2
  • RHSA-2024:1615 Released 2024-04-02 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux BaseOS (v. 8) expat-2.2.5-11.el8_9.1, expat-devel-2.2.5-11.el8_9.1
  • RHSA-2024:1530 Released 2024-03-26 · Red Hat rating Moderate
    expat security update
    • Red Hat Enterprise Linux AppStream (v. 9) expat-devel-2.5.0-1.el9_3.1
    • Red Hat Enterprise Linux BaseOS (v. 9) expat-2.5.0-1.el9_3.1

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: Will not fix
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:1530
Red Hat Enterprise Linux AppStream EUS (v.9.2)Fixed RHSA-2024:3926
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2024:1615, RHSA-2024:4259
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:1530
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2025:22871
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2025:22785
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:22035
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:2839
Red Hat Enterprise Linux BaseOS EUS (v.8.8)Fixed RHSA-2024:2575
Red Hat Enterprise Linux BaseOS EUS (v.9.2)Fixed RHSA-2024:3926
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2025:22785
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2024:4259
Red Hat JBoss Core Services 2.4.62Fixed RHSA-2025:3453
Not affected: 5 products
  • Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-52425
  2. 2026-10-03 Alias added: GHSA-gh68-jm46-84rf
  3. 2026-10-09 Fix available: RHSA-2025:3453 · Red Hat
  4. 2026-10-16 Fix available: Red Hat JBoss Core Services 2.4.62 · Red Hat

References

Exploit 1

Advisory 2

Other 3

  • 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