RHSA-2025:22607HighCVSS 7.5

Red Hat Security Advisory: expat security update

Published
December 2, 2025
Last Modified
August 4, 2026

🔗 CVE IDs covered (4)

CVE-2013-0340 →CVE-2022-23990 →CVE-2024-8176 →CVE-2025-59375 →

📋 Description

CVE-2013-0340 — expat: internal entity expansion CVE-2022-23990 — expat: integer overflow in the doProlog function CVE-2024-8176 — libexpat: expat: Improper Restriction of XML Entity Expansion Depth in libexpat CVE-2025-59375 — firefox: thunderbird: expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing

🎯 Affected products24

  • Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-0:2.2.10-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-0:2.2.10-1.el8_8.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-0:2.2.10-1.el8_8.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-debuginfo-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debuginfo-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-debuginfo-0:2.2.10-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debuginfo-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debuginfo-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-debugsource-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debugsource-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-debugsource-0:2.2.10-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debugsource-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-debugsource-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-devel-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-devel-0:2.2.10-1.el8_8.i686 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • expat-devel-0:2.2.10-1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-devel-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • expat-devel-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: To mitigate the issue, limit XML input size and complexity before parsing, and avoid accepting compressed or deeply nested XML. Use OS-level resource controls (like ulimit or setrlimit()) to cap memory usage, or run the parser in a sandboxed or isolated process with strict memory and CPU limits. This helps prevent denial-of-service by containing excessive resource consumption.

🔗 References (7)