CVE-2025-4948
Libsoup: integer underflow in soup_multipart_new_from_message() leading to denial of service in libsoup
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in the soup_multipart_new_from_message() function of the libsoup HTTP library, which is commonly used by GNOME and other applications to handle web communications. The issue occurs when the library processes specially crafted multipart messages. Due to improper validation, an internal calculation can go wrong, leading to an integer underflow. This can cause the program to access invalid memory and crash. As a result, any application or server using libsoup could be forced to exit unexpectedly, creating a denial-of-service (DoS) risk.
| CWE | CWE-191 |
| Published | May 19, 2025 |
| Last Updated | Nov 18, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support
All versions affected Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2025:21657 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8126 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8128 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8132 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8139 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8140 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8252 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8480 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8481 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8482 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:8663 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:9179 access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-4948 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2367183 gitlab.gnome.org: https://gitlab.gnome.org/GNOME/libsoup/-/issues/449
Credits
Red Hat would like to thank fouzhe and zkbytes for reporting this issue.