CVE-2025-40346
Vulnerability Scoring
Analysis In Progress
CVE-2025-40346 Vulnerability Analysis & Exploit Details
CVE-2025-40346
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-2025-40346 Details
Status: Awaiting Analysis
Last updated: 🕒 18 Dec 2025, 15:08 UTC
Originally published on: 🕑 16 Dec 2025, 14:15 UTC
Time between publication and last update: 2 days
CVSS Release:
CVE-2025-40346 Vulnerability Summary
CVE-2025-40346: In the Linux kernel, the following vulnerability has been resolved: arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate(). Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise." This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL. Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().
Assessing the Risk of CVE-2025-40346
Access Complexity Graph
The exploitability of CVE-2025-40346 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-2025-40346
No exploitability data is available for CVE-2025-40346.
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-2025-40346, 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-2025-40346, 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-2025-40346 does not compromise confidentiality.
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Integrity:
None
CVE-2025-40346 does not impact data integrity.
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Availability:
None
CVE-2025-40346 does not affect system availability.
CVE-2025-40346 References
External References
- https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68
- https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1
- https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e
- https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2
- https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f
- https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37
- https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235
CWE Common Weakness Enumeration
Unknown
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