CVE-2025-40315
Vulnerability Scoring
Analysis In Progress
CVE-2025-40315 Vulnerability Analysis & Exploit Details
CVE-2025-40315
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-2025-40315 Details
Status: Awaiting Analysis
Published on: 08 Dec 2025, 01:16 UTC
CVSS Release:
CVE-2025-40315 Vulnerability Summary
CVE-2025-40315: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix epfile null pointer access after ep enable. A race condition occurs when ffs_func_eps_enable() runs concurrently with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset() sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading to a NULL pointer dereference when accessing epfile->ep in ffs_func_eps_enable() after successful usb_ep_enable(). The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and ffs_data_close() functions, and its modification is protected by the spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function is also protected by ffs->eps_lock. Thus, add NULL pointer handling for ffs->epfiles in the ffs_func_eps_enable() function to fix issues
Assessing the Risk of CVE-2025-40315
Access Complexity Graph
The exploitability of CVE-2025-40315 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-2025-40315
No exploitability data is available for CVE-2025-40315.
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-2025-40315, 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-2025-40315, 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-2025-40315 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40315 does not impact data integrity.
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Availability:
None
CVE-2025-40315 does not affect system availability.
CVE-2025-40315 References
External References
- https://git.kernel.org/stable/c/1c0dbd240be3f87cac321b14e17979b7e9cb6a8f
- https://git.kernel.org/stable/c/30880e9df27332403dd638a82c27921134b3630b
- https://git.kernel.org/stable/c/9ec40fba7357df2d36f4c2e2f3b9b1a4fba0a272
- https://git.kernel.org/stable/c/b00d2572c16e8e59e979960d3383c2ae9cebd195
- https://git.kernel.org/stable/c/c53e90563bc148e4e0ad09fe130ba2246d426ea6
- https://git.kernel.org/stable/c/cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4
- https://git.kernel.org/stable/c/d62b808d5c68a931ad0849a00a5e3be3dd7e0019
- https://git.kernel.org/stable/c/fc1141a530dfc91f0ee19b7f422a2d24829584bc
CWE Common Weakness Enumeration
Unknown
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