Answer in brief
CVE-2024-8176 records a High severity (CVSS 7.5) vulnerability in Libexpat: expat: improper restriction of xml entity expansion depth in libexpat. The current sources do not mark it as known exploited. The current feed maps Red Hat/firefox (generic), Red Hat/firefox:flatpak/firefox (generic), libexpat (generic), Red Hat/mingw-expat (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/firefox (generic), Red Hat/firefox:flatpak/firefox (generic), libexpat (generic), Red Hat/mingw-expat (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/firefoxgeneric | * | Not reported |
| Red Hat/firefox:flatpak/firefoxgeneric | * | Not reported |
| libexpatgeneric | >=0 <2.7.0 | 2.7.0 |
| Red Hat/mingw-expatgeneric | * | Not reported |
| Red Hat/openshift/ose-rhel-coreos-8generic | * | Not reported |
| Red Hat/openshift/ose-rhel-coreos-9generic | * | Not reported |
| Red Hat/rhcosgeneric | * | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.2 | V3.2 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.0 <V3.1.5 | V3.1.5 |
| Red Hat/thunderbirdgeneric | * | Not reported |
| Red Hat/thunderbird:flatpak/thunderbirdgeneric | * | Not reported |
Published upstream
Mar 14, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage.
Quoted source text, attributed separately from HOL analysis.