Executive Summary



This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary
Informations
Name CVE-2025-38085 First vendor Publication 2025-06-28
Vendor Cve Last vendor Modification 2025-06-28

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-38085

Sources (Detail)

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
Source Url

Alert History

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0
Date Informations
2025-06-28 13:20:37
  • First insertion