Use After Free Affecting libsoup3 package, versions <3.6.5-4ubuntu0.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.43% (35th percentile)

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  • Snyk IDSNYK-UBUNTU2510-LIBSOUP3-13713304
  • published5 Nov 2025
  • disclosed23 Oct 2025

Introduced: 23 Oct 2025

CVE-2025-12105  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Ubuntu:25.10 libsoup3 to version 3.6.5-4ubuntu0.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3 package and not the libsoup3 package as distributed by Ubuntu. See How to fix? for Ubuntu:25.10 relevant fixed versions and status.

A flaw was found in the asynchronous message queue handling of the libsoup library, widely used by GNOME and WebKit-based applications to manage HTTP/2 communications. When network operations are aborted at specific timing intervals, an internal message queue item may be freed twice due to missing state synchronization. This leads to a use-after-free memory access, potentially crashing the affected application. Attackers could exploit this behavior remotely by triggering specific HTTP/2 read and cancel sequences, resulting in a denial-of-service condition.

CVSS Base Scores

version 3.1