CVE-2025-39799
Vulnerability Scoring
Analysis In Progress
CVE-2025-39799 Vulnerability Analysis & Exploit Details
CVE-2025-39799
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-2025-39799 Details
Status: Received on 12 Sep 2025, 16:15 UTC
Published on: 12 Sep 2025, 16:15 UTC
CVSS Release:
CVE-2025-39799 Vulnerability Summary
CVE-2025-39799: In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: perflib: Move problematic pr->performance check Commit d33bd88ac0eb ("ACPI: processor: perflib: Fix initial _PPC limit application") added a pr->performance check that prevents the frequency QoS request from being added when the given processor has no performance object. Unfortunately, this causes a WARN() in freq_qos_remove_request() to trigger on an attempt to take the given CPU offline later because the frequency QoS object has not been added for it due to the missing performance object. Address this by moving the pr->performance check before calling acpi_processor_get_platform_limit() so it only prevents a limit from being set for the CPU if the performance object is not present. This way, the frequency QoS request is added as it was before the above commit and it is present all the time along with the CPU's cpufreq policy regardless of whether or not the CPU is online.
Assessing the Risk of CVE-2025-39799
Access Complexity Graph
The exploitability of CVE-2025-39799 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-2025-39799
No exploitability data is available for CVE-2025-39799.
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-2025-39799, 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-2025-39799, 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-2025-39799 does not compromise confidentiality.
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Integrity:
None
CVE-2025-39799 does not impact data integrity.
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Availability:
None
CVE-2025-39799 does not affect system availability.
CVE-2025-39799 References
External References
- https://git.kernel.org/stable/c/19849010c9e18d54375091864a3313fc328d6186
- https://git.kernel.org/stable/c/31ee723d6fc581b76396994a96b85be3e87f67d6
- https://git.kernel.org/stable/c/8972d7dbdac029c9dbf62a45d7d8c71999785765
- https://git.kernel.org/stable/c/bf2809541497749c4f2646b87bf75244f5a2a5d9
- https://git.kernel.org/stable/c/cb4b5f4a1e778f6a20d06d4eda6842714a817618
- https://git.kernel.org/stable/c/d405ec23df13e6df599f5bd965a55d13420366b8
- https://git.kernel.org/stable/c/edc065c19257adfd9c356178dac021df661e169e
- https://git.kernel.org/stable/c/fc36403e741d7674a44632313db33fa7605cb2b4
- https://git.kernel.org/stable/c/fd9cad6b0676e0bb3a98ee0a8865a86e2f53eb07
CWE Common Weakness Enumeration
Unknown
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