Use-After-Free Vulnerability in Libsoup Library for Network Applications

CVE-2025-12105

What is CVE-2025-12105?

A flaw in the asynchronous message queue management of the libsoup library, extensively utilized in GNOME and WebKit applications, allows for problematic handling of HTTP/2 communications. This vulnerability arises when network operations are aborted under specific timing conditions, leading to a situation where an internal message queue item may be freed multiple times due to a lack of state synchronization. Consequently, this can result in a use-after-free memory access, potentially causing the affected applications to crash. Remote attackers could exploit this issue by carefully crafting specific HTTP/2 read and cancel sequences, which may ultimately lead to a denial-of-service scenario.

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