CVE-2025-39713
Vulnerability Scoring
Analysis In Progress
CVE-2025-39713 Vulnerability Analysis & Exploit Details
CVE-2025-39713
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-2025-39713 Details
Status: Received on 05 Sep 2025, 18:15 UTC
Published on: 05 Sep 2025, 18:15 UTC
CVSS Release:
CVE-2025-39713 Vulnerability Summary
CVE-2025-39713: In the Linux kernel, the following vulnerability has been resolved: media: rainshadow-cec: fix TOCTOU race condition in rain_interrupt() In the interrupt handler rain_interrupt(), the buffer full check on rain->buf_len is performed before acquiring rain->buf_lock. This creates a Time-of-Check to Time-of-Use (TOCTOU) race condition, as rain->buf_len is concurrently accessed and modified in the work handler rain_irq_work_handler() under the same lock. Multiple interrupt invocations can race, with each reading buf_len before it becomes full and then proceeding. This can lead to both interrupts attempting to write to the buffer, incrementing buf_len beyond its capacity (DATA_SIZE) and causing a buffer overflow. Fix this bug by moving the spin_lock() to before the buffer full check. This ensures that the check and the subsequent buffer modification are performed atomically, preventing the race condition. An corresponding spin_unlock() is added to the overflow path to correctly release the lock. This possible bug was found by an experimental static analysis tool developed by our team.
Assessing the Risk of CVE-2025-39713
Access Complexity Graph
The exploitability of CVE-2025-39713 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-2025-39713
No exploitability data is available for CVE-2025-39713.
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-2025-39713, 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-2025-39713, 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-2025-39713 does not compromise confidentiality.
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Integrity:
None
CVE-2025-39713 does not impact data integrity.
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Availability:
None
CVE-2025-39713 does not affect system availability.
CVE-2025-39713 References
External References
- https://git.kernel.org/stable/c/1c2769dc80255824542ea5a4ff1a07dcdeb1603f
- https://git.kernel.org/stable/c/2964dbe631fd21ad7873b1752b895548d3c12496
- https://git.kernel.org/stable/c/3c3e33b7edca7a2d6a96801f287f9faeb684d655
- https://git.kernel.org/stable/c/6aaef1a75985865d8c6c5b65fb54152060faba48
- https://git.kernel.org/stable/c/7af160aea26c7dc9e6734d19306128cce156ec40
- https://git.kernel.org/stable/c/ed905fe7cba03cf22ae0b84cf1b73cd1c070423a
- https://git.kernel.org/stable/c/fbc81e78d75bf28972bc22b1599559557b1a1b83
- https://git.kernel.org/stable/c/ff9dd3db6cd4c6b54a2ecbc58151bea4ec63bc59
CWE Common Weakness Enumeration
Unknown
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