CVE-2025-12105

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.

The Red Hat Product Security team has assessed the severity of this vulnerability as High, as it can be triggered remotely without authentication or user interaction, leading to the crash of applications or network services relying on libsoup for HTTP/2 processing. While there is no evidence of code execution or system compromise, the flaw results in a complete denial-of-service of affected processes, which can disrupt service availability in production environments.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability.