CVE-2025-12105: Gnome Libsoup

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Gnome Libsoup: up to and including 3.6.5
• Red Hat Red Hat Enterprise Linux 10: before 0:3.6.5-3.el10_1.7 (fixed in 0:3.6.5-3.el10_1.7)
• Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: before 0:3.6.5-3.el10_0.10 (fixed in 0:3.6.5-3.el10_0.10)
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9

Published 2025-10-23. Last modified 2026-06-30.