CVE-2025-38085
Vulnerability Scoring
Analysis In Progress
CVE-2025-38085 Vulnerability Analysis & Exploit Details
CVE-2025-38085
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-2025-38085 Details
Status: Awaiting Analysis
Last updated: 🕕 30 Jul 2025, 06:15 UTC
Originally published on: 🕗 28 Jun 2025, 08:15 UTC
Time between publication and last update: 31 days
CVSS Release:
CVE-2025-38085 Vulnerability Summary
CVE-2025-38085: In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race huge_pmd_unshare() drops a reference on a page table that may have previously been shared across processes, potentially turning it into a normal page table used in another process in which unrelated VMAs can afterwards be installed. If this happens in the middle of a concurrent gup_fast(), gup_fast() could end up walking the page tables of another process. While I don't see any way in which that immediately leads to kernel memory corruption, it is really weird and unexpected. Fix it with an explicit broadcast IPI through tlb_remove_table_sync_one(), just like we do in khugepaged when removing page tables for a THP collapse.
Assessing the Risk of CVE-2025-38085
Access Complexity Graph
The exploitability of CVE-2025-38085 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-2025-38085
No exploitability data is available for CVE-2025-38085.
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-2025-38085, 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-2025-38085, 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-2025-38085 does not compromise confidentiality.
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Integrity:
None
CVE-2025-38085 does not impact data integrity.
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Availability:
None
CVE-2025-38085 does not affect system availability.
CVE-2025-38085 References
External References
- https://git.kernel.org/stable/c/034a52b5ef57c9c8225d94e9067f3390bb33922f
- https://git.kernel.org/stable/c/1013af4f585fccc4d3e5c5824d174de2257f7d6d
- https://git.kernel.org/stable/c/952596b08c74e8fe9e2883d1dc8a8f54a37384ec
- https://git.kernel.org/stable/c/a3d864c901a300c295692d129159fc3001a56185
- https://git.kernel.org/stable/c/a6bfeb97941a9187833b526bc6cc4ff5706d0ce9
- https://git.kernel.org/stable/c/b7754d3aa7bf9f62218d096c0c8f6c13698fac8b
- https://git.kernel.org/stable/c/fe684290418ef9ef76630072086ee530b92f02b8
- https://project-zero.issues.chromium.org/issues/420715744
CWE Common Weakness Enumeration
Unknown
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