CVE-2025-40231
Vulnerability Scoring
Analysis In Progress
CVE-2025-40231 Vulnerability Analysis & Exploit Details
CVE-2025-40231
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-40231 Details
Status: Awaiting Analysis
Published on: 04 Dec 2025, 16:16 UTC
CVSS Release:
CVE-2025-40231 Vulnerability Summary
CVE-2025-40231: In the Linux kernel, the following vulnerability has been resolved: vsock: fix lock inversion in vsock_assign_transport() Syzbot reported a potential lock inversion deadlock between vsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called. The issue was introduced by commit 687aa0c5581b ("vsock: Fix transport_* TOCTOU") which added vsock_register_mutex locking in vsock_assign_transport() around the transport->release() call, that can call vsock_linger(). vsock_assign_transport() can be called with sk_lock held. vsock_linger() calls sk_wait_event() that temporarily releases and re-acquires sk_lock. During this window, if another thread hold vsock_register_mutex while trying to acquire sk_lock, a circular dependency is created. Fix this by releasing vsock_register_mutex before calling transport->release() and vsock_deassign_transport(). This is safe because we don't need to hold vsock_register_mutex while releasing the old transport, and we ensure the new transport won't disappear by obtaining a module reference first via try_module_get().
Assessing the Risk of CVE-2025-40231
Access Complexity Graph
The exploitability of CVE-2025-40231 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2025-40231
No exploitability data is available for CVE-2025-40231.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2025-40231, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2025-40231, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2025-40231 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40231 does not impact data integrity.
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Availability:
None
CVE-2025-40231 does not affect system availability.
CVE-2025-40231 References
External References
- https://git.kernel.org/stable/c/09bba278ccde25a14b6e5088a9e65a8717d0cccf
- https://git.kernel.org/stable/c/251caee792a21eb0b781aab91362b422c945e162
- https://git.kernel.org/stable/c/42ed0784d11adebf748711e503af0eb9f1e6d81d
- https://git.kernel.org/stable/c/a2a4346eea8b4cb75037dbcb20b98cb454324f80
- https://git.kernel.org/stable/c/b44182c116778feaa05da52a426aeb9da1878dcf
- https://git.kernel.org/stable/c/ce4f856c64f0bc30e29302a0ce41f4295ca391c5
- https://git.kernel.org/stable/c/f7c877e7535260cc7a21484c994e8ce7e8cb6780
CWE Common Weakness Enumeration
Unknown
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