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CVE-2024-8176

HIGH 7.5 ALL-YEARS

Published 2025-03-14 · Last modified 2026-10-21 · redhat · NVD: Deferred

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.

ELEVATED IMPACT

Severe if exploited (CVSS 7.5), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

1.4%chance of exploitation in 30 days · 71st percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation poc, automatable yes

Impact if exploited

7.5CVSS 3.1 · HIGH · CNA

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Red Hat Siemens

Products Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long Life Add On Red Hat Enterprise Linux 8.4 Telecommunications Update Service Red Hat Enterprise Linux 8.4 Update Services For Sap Solutions Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Telecommunications Update Service Red Hat Enterprise Linux 8.6 Update Services For Sap Solutions Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat Enterprise Linux 8.8 Update Services For Sap Solutions Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 9.0 Update Services For Sap Solutions Red Hat Enterprise Linux 9.2 Update Services For Sap Solutions Red Hat Enterprise Linux 9.4 Extended Update Support Red Hat Jboss Core Services 2.4.62.Sp1 Devworkspace Operator 0.33 Red Hat Discovery 1.14 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Openshift Container Platform 4 Simatic S7 1500 Cpu 1518 4 Pn/Dp Mfp Simatic S7 1500 Cpu 1518f 4 Pn/Dp Mfp Siplus S7 1500 Cpu 1518 4 Pn/Dp Mfp Ruggedcom Rst2428p Scalance Xc 300/Xr 300/Xc 400/Xr 500wg/Xr 500 Family Scalance Xcm /Xrm /Xch /Xrh 300 Family

Weakness (CWE)

  • CWE-674: Uncontrolled Recursion

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 659 vendor product statements; 627 omitted. Read the full vendor advisory.

  • expat-debuginfo-0:2.7.1-1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.7.1-1.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0?arch=ppc64le

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-client++-debuginfo-0:1.51.0-11.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/xmlrpc-c-client%2B%[email protected]_10?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-c++-debuginfo-0:1.51.0-5.el8_4.2.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/xmlrpc-c-c%2B%[email protected]_4.2?arch=i686

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-client++-debuginfo-0:1.51.0-5.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/xmlrpc-c-client%2B%[email protected]_4.2?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-c++-debuginfo-0:1.51.0-6.el8_6.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/xmlrpc-c-c%2B%[email protected]_6.1?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-0:1.51.0-8.el8_8.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8.1?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-0:2.2.10-12.el9_0.4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0.4?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-apps-debuginfo-0:1.51.0-11.el8_10.s390x as a component of Red Hat Enterprise Linux CRB (v. 8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_10?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • xmlrpc-c-c++-0:1.51.0-8.el8_8.1.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.8.8) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/xmlrpc-c-c%2B%[email protected]_8.1?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • Red Hat JBoss Core Services 2.4.62.SP1 · fixed

    Vendor assessment for this product only.

    • vendor fix: Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link. You must be logged in to download the update. Vendor guidance
    • 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.
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • compat-expat1 as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/compat-expat1

    • 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.
    • no fix planned: Out of support scope
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-devel as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/expat-devel

    • 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.
    • no fix planned: Out of support scope
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-devel as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/expat-devel

    • 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.
    • no fix planned: Out of support scope
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • firefox as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/firefox

    • 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.
    • no fix planned: Out of support scope
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • thunderbird.src as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/thunderbird?arch=src

    • 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.
    • no fix planned: Out of support scope
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • mingw32-expat as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/mingw32-expat

    • 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.
    • none available: Affected
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • thunderbird.src as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/thunderbird?arch=src

    • 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.
    • none available: Affected
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • firefox-x11 (firefox:flatpak) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/firefox-x11?rpmmod=firefox:flatpak

    • 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.
    • none available: Affected
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • firefox (firefox:flatpak) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/firefox?rpmmod=firefox:flatpak

    • 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.
    • none available: Affected
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • thunderbird.src (thunderbird:flatpak) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/thunderbird?arch=src&rpmmod=thunderbird:flatpak

    • 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.
    • none available: Affected
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known affected

    Vendor assessment for this product only.

    pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9

    • 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.
    • no fix planned: Will not fix
    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.2.10-12.el9_0.4.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_0.4?arch=aarch64

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.5.0-1.el9_2.3.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_2.3?arch=ppc64le

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.5.0-2.el9_4.3.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_4.3?arch=s390x

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-devel-0:2.2.10-1.el8_2.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_2?arch=i686

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-0:2.2.10-1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_6?arch=src

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debugsource-0:2.2.10-1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_6?arch=x86_64

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.2.10-1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_8?arch=x86_64

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debuginfo-0:2.2.10-12.el9_0.4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.0) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_0.4?arch=ppc64le

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • expat-debugsource-0:2.5.0-1.el9_2.3.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2) · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]_2.3?arch=s390x

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00
  • lua-expat.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/lua-expat?arch=src

    Red Hat · CVE-2024-8176 · Updated 2026-10-21T20:11:20+00:00

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

1 candidate

All CVSS metrics

  • HIGH 7.5 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • HIGH 7.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS