CVE catalog

CVE-2024-8176

Expat vulnerability

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Dec 12, 2023, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.35% · Oct 27, 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	expat	sid	`2.9.0-1`	fixed
Debian	expat	forky	`2.9.0-1`	fixed
Debian	expat	trixie	`2.8.3-1~deb13u1`	fixed
Debian	expat	trixie-security	`2.9.0-1~deb13u1`	fixed
Debian	expat	bookworm	`2.5.0-1+deb12u2`	fixed
Debian	expat	bookworm-security	`2.5.0-1+deb12u5`	fixed
Debian	libxmltok	bookworm	`1.2-4`	vulnerable
Ubuntu	libxmltok	noble	Not reported	vulnerable
Ubuntu	expat	noble	`2.5.0-1+deb12u2`	fixed
Ubuntu	expat	noble	`2.6.1-2ubuntu0.3`	fixed
Ubuntu	libexpat1	noble	`2.6.1-2ubuntu0.3`	fixed
Ubuntu	libexpat1-dev	noble	`2.6.1-2ubuntu0.3`	fixed
Alpine	expat	3.18	`2.7.0-r0`	fixed
Alpine	expat	3.19	`2.7.0-r0`	fixed
Alpine	expat	3.20	`2.7.0-r0`	fixed
Alpine	expat	3.21	`2.7.0-r0`	fixed
Alpine	expat	3.22	`2.7.0-r0`	fixed
Alpine	expat	3.23	`2.7.0-r0`	fixed
Alpine	expat	3.24	`2.7.0-r0`	fixed
Ubuntu	expat	22.04	`2.4.1-2`	vulnerable
Ubuntu	expat	22.04	`2.4.1-3`	vulnerable
Ubuntu	expat	22.04	`2.4.2-1`	vulnerable
Ubuntu	expat	22.04	`2.4.3-1`	vulnerable
Ubuntu	expat	22.04	`2.4.3-2`	vulnerable
Ubuntu	expat	22.04	`2.4.4-1`	vulnerable
Ubuntu	expat	22.04	`2.4.6-1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.1`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.2`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.3`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.4`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.5`	vulnerable
Ubuntu	expat	22.04	`2.4.7-1ubuntu0.6`	fixed
Ubuntu	expat	24.04	`2.5.0-2`	vulnerable
Ubuntu	expat	24.04	`2.6.0-1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2build1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.1`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.2`	vulnerable
Ubuntu	expat	24.04	`2.6.1-2ubuntu0.3`	fixed
Suse	expat	linux enterprise micro 5.3	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise micro 5.4	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise micro 5.5	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise module for basesystem 15 sp6	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise high performance computing 15 sp4-espos	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise high performance computing 15 sp4-ltss	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise high performance computing 15 sp5-espos	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise high performance computing 15 sp5-ltss	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise server 15 sp4-ltss	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise server 15 sp5-ltss	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise server for sap applications 15 sp4	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise server for sap applications 15 sp5	`2.7.1-150400.3.28.1`	fixed
Suse	expat	manager proxy 4.3	`2.7.1-150400.3.28.1`	fixed
Suse	expat	manager server 4.3	`2.7.1-150400.3.28.1`	fixed
Opensuse	expat	leap 15.6	`2.7.1-150400.3.28.1`	fixed
Suse	expat	linux enterprise server 12 sp5-ltss	`2.7.1-21.43.1`	fixed
Suse	expat	linux enterprise server ltss extended security 12 sp5	`2.7.1-21.43.1`	fixed
Suse	expat	linux enterprise high performance computing 15 sp3-ltss	`2.7.1-150000.3.36.1`	fixed
Suse	expat	linux enterprise server 15 sp3-ltss	`2.7.1-150000.3.36.1`	fixed
Suse	expat	linux enterprise server for sap applications 15 sp3	`2.7.1-150000.3.36.1`	fixed
Suse	expat	linux enterprise micro 5.1	`2.7.1-150000.3.36.1`	fixed
Suse	expat	linux enterprise micro 5.2	`2.7.1-150000.3.36.1`	fixed
Suse	expat	enterprise storage 7.1	`2.7.1-150000.3.36.1`	fixed
Opensuse	expat	tumbleweed	`2.7.1-1.1`	fixed
Suse	expat	linux enterprise module for basesystem 15 sp7	`2.7.1-150700.3.3.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	expat	source	sid	`2.7.0-1`	not yet assigned	Not reported	Not reported
Debian	expat	source	forky	`2.7.0-1`	not yet assigned	Not reported	Not reported
Debian	expat	source	trixie	`2.7.0-1`	not yet assigned	Not reported	Not reported
Debian	expat	source	bookworm	`2.5.0-1+deb12u2`	not yet assigned	Not reported	Not reported
Debian	libxmltok	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Ubuntu	expat	deb	noble	`2.5.0-1+deb12u2`	Not reported	Not reported	Not reported
Ubuntu	expat	deb	noble	`2.6.1-2ubuntu0.3`	Not reported	Not reported	Not reported
Ubuntu	libexpat1	deb	noble	`2.6.1-2ubuntu0.3`	Not reported	Not reported	Not reported
Ubuntu	libexpat1-dev	deb	noble	`2.6.1-2ubuntu0.3`	Not reported	Not reported	Not reported
Alpine	expat	apk	3.18	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.19	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.20	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.21	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.22	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.23	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Alpine	expat	apk	3.24	`2.7.0-r0`	Not reported	ALPINE-CVE-2024-8176	Not reported
Ubuntu	expat	deb	22.04	`2.4.7-1ubuntu0.6`	Not reported	USN-7424-1	Not reported
Ubuntu	expat	deb	24.04	`2.6.1-2ubuntu0.3`	Not reported	USN-7424-1	Not reported
Suse	expat	rpm	linux enterprise micro 5.3	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise micro 5.4	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise micro 5.5	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise module for basesystem 15 sp6	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise high performance computing 15 sp4-espos	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise high performance computing 15 sp4-ltss	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise high performance computing 15 sp5-espos	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise high performance computing 15 sp5-ltss	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise server 15 sp4-ltss	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise server 15 sp5-ltss	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise server for sap applications 15 sp4	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise server for sap applications 15 sp5	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	manager proxy 4.3	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	manager server 4.3	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Opensuse	expat	rpm	leap 15.6	`2.7.1-150400.3.28.1`	Not reported	SUSE-SU-2025:1201-1	Not reported
Suse	expat	rpm	linux enterprise server 12 sp5-ltss	`2.7.1-21.43.1`	Not reported	SUSE-SU-2025:1295-1	Not reported
Suse	expat	rpm	linux enterprise server ltss extended security 12 sp5	`2.7.1-21.43.1`	Not reported	SUSE-SU-2025:1295-1	Not reported
Suse	expat	rpm	linux enterprise high performance computing 15 sp3-ltss	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Suse	expat	rpm	linux enterprise server 15 sp3-ltss	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Suse	expat	rpm	linux enterprise server for sap applications 15 sp3	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Suse	expat	rpm	linux enterprise micro 5.1	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Suse	expat	rpm	linux enterprise micro 5.2	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Suse	expat	rpm	enterprise storage 7.1	`2.7.1-150000.3.36.1`	Not reported	SUSE-SU-2025:1186-1	Not reported
Opensuse	expat	rpm	tumbleweed	`2.7.1-1.1`	Not reported	OPENSUSE-SU-2025:14952-1	Not reported
Suse	expat	rpm	linux enterprise module for basesystem 15 sp7	`2.7.1-150700.3.3.1`	Not reported	SUSE-SU-2025:03239-1	Not reported

Notes

[bookworm] libxmltok: Minor issue, no runtime dependencies left

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxmltok1]Affected
Source package: [libxmltok]
Details (2)
- 1.2-4 · amd64 · bookworm
  Affected
  usn · libxmltok · debian · bookworm; usn · libxmltok · debian · 12
- 1.2-4 · arm64 · bookworm
  Affected
  usn · libxmltok · debian · bookworm; usn · libxmltok · debian · 12
[libxmltok1-dev]Affected
Source package: [libxmltok]
Details (2)
- 1.2-4 · amd64 · bookworm
  Affected
  usn · libxmltok · debian · bookworm; usn · libxmltok · debian · 12
- 1.2-4 · arm64 · bookworm
  Affected
  usn · libxmltok · debian · bookworm; usn · libxmltok · debian · 12
[expat]Fixed
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
[libexpat1]Fixed
Source package: [expat]
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
[libexpat1-dev]Fixed
Source package: [expat]
Details (4)
- 2.5.0-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · amd64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12
- 2.5.0-1+deb12u3 · arm64 · bookworm-security
  Fixed · Fixed: 2.5.0-1+deb12u2
  usn · expat · debian · bookworm; usn · expat · debian · 12

[openSUSE Tumbleweed]

[libexpat1]Unknown
Source package: [expat]
Details (1)
- 2.8.2-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.1-1.1
  Version impact unknown
  usn · expat · opensuse · tumbleweed
[libexpat1-32bit]Unknown
Source package: [expat]
Details (1)
- 2.8.2-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.1-1.1
  Version impact unknown
  usn · expat · opensuse · tumbleweed
[libexpat-devel]Unknown
Source package: [expat]
Details (1)
- 2.8.2-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.1-1.1
  Version impact unknown
  usn · expat · opensuse · tumbleweed
[libexpat-devel-32bit]Unknown
Source package: [expat]
Details (1)
- 2.8.2-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.1-1.1
  Version impact unknown
  usn · expat · opensuse · tumbleweed
[expat]Fixed
Source package: [expat]
Details (1)
- 2.8.2-1.1 · x86_64 · tumbleweed
  Fixed · Fixed: 2.7.1-1.1
  usn · expat · opensuse · tumbleweed

[Debian 13 (Trixie)]

[expat]Fixed
Details (6)
- 2.7.1-2 · amd64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
[libexpat1]Fixed
Source package: [expat]
Details (6)
- 2.7.1-2 · amd64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
[libexpat1-dev]Fixed
Source package: [expat]
Details (6)
- 2.7.1-2 · amd64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.7.1-2 · arm64 · trixie
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.2-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · amd64 · trixie-security · Historical version
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.8.3-1~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13
- 2.9.0-1~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.7.0-1
  usn · expat · debian · 13

Observed: Oct 28, 2026, 5:42:49 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]