CVE intelligence

CVE-2025-4948

Vulnerability intelligence

Published May 19, 2025Sources checked Nov 12, 2026

7.5HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2025-4948 and is rated High severity with a CVSS score of 7.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 12, 2026

CBL-Mariner Releases

Vendor-listed releases

3.0.4-8
3.4.4-8

CISA KEVNot listedBased on the latest collected catalog

EPSS1.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2025-4948?

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.

Source: NVD