CVE-2025-4948: Libsoup: integer underflow in soup_multipart_new_from_message() leading to denial of service in libsoup
Description
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.
Classification
CVE ID: CVE-2025-4948
Problem Types
Integer Underflow (Wrap or Wraparound)Affected Products
Vendor: Red Hat
Product: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.1% (probability of being exploited)
EPSS Percentile: 28.69% (scored less or equal to compared to others)
EPSS Date: 2025-06-17 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4948https://access.redhat.com/security/cve/CVE-2025-4948
https://bugzilla.redhat.com/show_bug.cgi?id=2367183