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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-38085 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/034a52b5ef57c9c8225d94e9067f3390bb33922f kernel.org Patch 
https://git.kernel.org/stable/c/1013af4f585fccc4d3e5c5824d174de2257f7d6d kernel.org Patch 
https://git.kernel.org/stable/c/952596b08c74e8fe9e2883d1dc8a8f54a37384ec kernel.org Patch 
https://git.kernel.org/stable/c/a3d864c901a300c295692d129159fc3001a56185 kernel.org Patch 
https://git.kernel.org/stable/c/a6bfeb97941a9187833b526bc6cc4ff5706d0ce9 kernel.org Patch 
https://git.kernel.org/stable/c/b7754d3aa7bf9f62218d096c0c8f6c13698fac8b kernel.org Patch 
https://git.kernel.org/stable/c/fe684290418ef9ef76630072086ee530b92f02b8 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html CVE Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html CVE Third Party Advisory 
https://project-zero.issues.chromium.org/issues/420715744 kernel.org Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-38085
NVD Published Date:
06/28/2025
NVD Last Modified:
12/18/2025
Source:
kernel.org