NULL pointer dereference in libsoup - CVE-2025-4476

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Main Vulnerability Database Vulnerabilities #VU109944

NULL pointer dereference in libsoup - CVE-2025-4476

Published: May 29, 2025


Vulnerability identifier: #VU109944
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-4476
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. when handling 401 (Unauthorized) HTTP responses. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.


Affected software

libsoup
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Micro
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
Anolis OS
Fedora
libsoup2.4 (Ubuntu package)
libsoup-debugsource
libsoup-2_4-1-debuginfo
libsoup-2_4-1
libsoup-2_4-1-32bit-debuginfo
libsoup2-lang
libsoup-2_4-1-64bit-debuginfo
libsoup-2_4-1-64bit
libsoup2-devel-64bit
libsoup2-devel-32bit
libsoup-2_4-1-32bit
typelib-1_0-Soup-2_4
libsoup2-debugsource
libsoup2-devel
libsoup
libsoup-debuginfo
libsoup-devel
libsoup-help
mingw-libsoup
libsoup-doc
typelib-1_0-Soup-3_0
libsoup-3_0-0-64bit
libsoup-devel-64bit
libsoup-lang
libsoup-devel-32bit
libsoup-3_0-0-32bit
libsoup-3_0-0-32bit-debuginfo
libsoup-3_0-0-debuginfo
libsoup-3_0-0
libsoup-3_0-0-64bit-debuginfo
libsoup3
libsoup3-help
libsoup3-devel
libsoup3-debugsource
libsoup3-debuginfo
IBM App Connect Enterprise

How to mitigate CVE-2025-4476

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

libsoup2.4 (Ubuntu package) - addressed in versions 2.52.2-1ubuntu0.3+esm3, 2.62.1-1ubuntu0.4+esm4, 2.70.0-1ubuntu0.5, 2.74.2-3ubuntu0.5, 2.74.3-6ubuntu1.5, 2.74.3-7ubuntu0.5, 2.74.3-10ubuntu0.3, 3.0.7-0ubuntu1+esm4, 3.4.4-5ubuntu0.4, 3.6.0-2ubuntu0.4, 3.6.5-1ubuntu0.1
libsoup-debugsource - addressed in versions 2.68.4-150200.4.27.1, 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-2_4-1-debuginfo - addressed in versions 2.68.4-150200.4.27.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1 - addressed in versions 2.68.4-150200.4.27.1, 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-32bit-debuginfo - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-lang - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-64bit-debuginfo - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-64bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-devel-64bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-devel-32bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup-2_4-1-32bit - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
typelib-1_0-Soup-2_4 - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-debugsource - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup2-devel - addressed in versions 2.74.2-150400.3.26.1, 2.74.3-150600.4.24.1
libsoup - update to 2.74.3-10
libsoup-debuginfo - update to 2.74.3-10
libsoup-debugsource - update to 2.74.3-10
libsoup-devel - update to 2.74.3-10
libsoup-help - update to 2.74.3-10
mingw-libsoup - addressed in versions 2.74.3-12.fc41, 2.74.3-12.fc42
libsoup - update to 2.74.3-17
libsoup-devel - update to 2.74.3-17
libsoup-doc - update to 2.74.3-17
typelib-1_0-Soup-3_0 - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0-64bit - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-devel-64bit - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-lang - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-devel-32bit - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0-32bit - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0-32bit-debuginfo - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0-debuginfo - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0 - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-devel - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup-3_0-0-64bit-debuginfo - addressed in versions 3.0.4-150400.3.10.1, 3.4.4-150600.3.10.1
libsoup3 - update to 3.4.4-5
libsoup3-help - update to 3.4.4-5
libsoup3-devel - update to 3.4.4-5
libsoup3-debugsource - update to 3.4.4-5
libsoup3-debuginfo - update to 3.4.4-5
libsoup3 - addressed in versions 3.6.5-2.fc41, 3.6.5-2.fc42
IBM App Connect Enterprise - addressed in versions 12.0.12, 12.12.0

External References

Related Security Bulletins