CVE-2025-40106
Vulnerability Scoring
Analysis In Progress
CVE-2025-40106 Vulnerability Analysis & Exploit Details
CVE-2025-40106
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-2025-40106 Details
Status: Received on 31 Oct 2025, 10:15 UTC
Published on: 31 Oct 2025, 10:15 UTC
CVSS Release:
CVE-2025-40106 Vulnerability Summary
CVE-2025-40106: In the Linux kernel, the following vulnerability has been resolved: comedi: fix divide-by-zero in comedi_buf_munge() The comedi_buf_munge() function performs a modulo operation `async->munge_chan %= async->cmd.chanlist_len` without first checking if chanlist_len is zero. If a user program submits a command with chanlist_len set to zero, this causes a divide-by-zero error when the device processes data in the interrupt handler path. Add a check for zero chanlist_len at the beginning of the function, similar to the existing checks for !map and CMDF_RAWDATA flag. When chanlist_len is zero, update munge_count and return early, indicating the data was handled without munging. This prevents potential kernel panics from malformed user commands.
Assessing the Risk of CVE-2025-40106
Access Complexity Graph
The exploitability of CVE-2025-40106 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-2025-40106
No exploitability data is available for CVE-2025-40106.
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-2025-40106, 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-2025-40106, 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-2025-40106 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40106 does not impact data integrity.
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Availability:
None
CVE-2025-40106 does not affect system availability.
CVE-2025-40106 References
External References
- https://git.kernel.org/stable/c/2670932f2465793fea1ef073e40883e8390fa4d9
- https://git.kernel.org/stable/c/4ffea48c69cb2b96a281cb7e5e42d706996631db
- https://git.kernel.org/stable/c/55520f65fd447e04099a2c44185453c18ea73b7e
- https://git.kernel.org/stable/c/6db19822512396be1a3e1e20c16c97270285ba1a
- https://git.kernel.org/stable/c/87b318ba81dda2ee7b603f4f6c55e78ec3e95974
- https://git.kernel.org/stable/c/8f3e4cd9be4b47246ea73ce5e3e0fa2f57f0d10c
- https://git.kernel.org/stable/c/a4bb5d1bc2f238461bcbe5303eb500466690bb2c
- https://git.kernel.org/stable/c/d4854eff25efb06d0d84c13e7129bbdba4125f8c
CWE Common Weakness Enumeration
Unknown
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