CVE-2025-12105 HIGH

CVE-2025-12105: Libsoup: heap use-after-free in libsoup message queue handling during http/2 read completion

Vendor Gnome
Product libsoup
Weakness CWE-416
Published October 23, 2025
Last update June 29, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 23, 2025 CVE published
June 29, 2026 Record updated