CVE-2025-40231

A flaw was found in the Linux kernel’s vsock (virtual socket) subsystem involving a lock inversion between vsock_register_mutex and the AF_VSOCK sk_lock.Under specific interleavings, vsock_assign_transport() may be called while holding sk_lock, and within that path a call to vsock_linger() may temporarily release and then re-acquire sk_lock. If another thread simultaneously holds vsock_register_mutex and attempts to take sk_lock, a circular dependency can occur leading to a deadlock.

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 widespread installation base or stability.