7.5

CVE-2024-8176: Libexpat: expat: improper restriction of xml entity expansion depth in libexpat

Deferred
AliasesALPINE-CVE-2024-8176MGASA-2025-0109SUSE-SU-2025:03239-1
Published 14-03-2025Last modified 21-10-2026

Vulnerability summary

CVE-2024-8176 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in expat. EPSS estimates a 1.35% chance of exploitation in the next 30 days, higher than 71.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.35%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 7
MGASA-2025-0240RHSA-2025:22033RHSA-2025:22034RHSA-2025:22035RHSA-2025:22607RHSA-2025:22785

Timeline

  1. 14-03-2025
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

1.35%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 1.33% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse23 products
  • expat&distro=SUSE Enterprise Storage 7.1< 2.7.1-150000.3.36.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS< 2.7.1-150000.3.36.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 2.7.1-150400.3.28.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 2.7.1-150400.3.28.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 2.7.1-150400.3.28.1
Ubuntu16 products
  • ayttmAll versions (No fix recorded)
  • cableswigAll versions (No fix recorded)
  • cadaverAll versions (No fix recorded)
  • coin3All versions (No fix recorded)
  • expatAll versions (No fix recorded) | < 2.4.7-1ubuntu0.6 | < 2.6.1-2ubuntu0.3 | < 2.7.1-1
Redhat13 products
  • expat< 0:2.5.0-3.el9_5.3 | < 0:2.2.5-17.el8_10 | < 0:2.5.0-5.el9_6 | < 0:2.7.1-1.el10_0
  • expat-debuginfo< 0:2.5.0-3.el9_5.3 | < 0:2.2.5-17.el8_10 | < 0:2.5.0-5.el9_6 | < 0:2.7.1-1.el10_0
  • expat-debugsource< 0:2.5.0-3.el9_5.3 | < 0:2.2.5-17.el8_10 | < 0:2.5.0-5.el9_6 | < 0:2.7.1-1.el10_0
  • expat-devel< 0:2.5.0-3.el9_5.3 | < 0:2.2.5-17.el8_10 | < 0:2.5.0-5.el9_6 | < 0:2.7.1-1.el10_0
  • xmlrpc-c< 0:1.51.0-11.el8_10 | < 0:1.51.0-8.el8_8.1 | < 0:1.51.0-5.el8_2.2 | < 0:1.51.0-5.el8_4.2 | < 0:1.51.0-6.el8_6.1
Debian2 products
  • expat< 2.5.0-1+deb12u2 | < 2.7.0-1
  • libxmltokAll versions (No fix recorded)
Opensuse2 products
  • expat&distro=openSUSE Leap 15.6< 2.7.1-150400.3.28.1
  • expat&distro=openSUSE Tumbleweed< 2.7.1-1.1
Alpine1 product
  • expat< 2.7.0-r0
Chainguard1 product
  • expat< 2.7.0-r0
Mageia1 product
  • expat< 2.7.0-1.mga9
Wolfi1 product
  • expat< 2.7.0-r0

9 vendors · 60 products

References

71 links
Show all 71 references