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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64395 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require source read access for duplicate extents FSCTL_DUPLICATE_EXTENTS_TO_FILE passes the source file directly to vfs_clone_file_range() or vfs_copy_file_range() without checking the SMB access mask granted to the source handle. A handle opened with attribute access can consequently be used to copy file contents into an attacker-readable destination. Require FILE_READ_DATA on the source handle before either VFS operation, matching other ksmbd data-copy paths.


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.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/2d2ab6983620c2d60ce7db72133984ca3873b929 kernel.org
https://git.kernel.org/stable/c/67bdad9cf01b25030e3bf00bbce6c309319d6663 kernel.org
https://git.kernel.org/stable/c/a10942af27832c2761d020863a46e79bebe0567d kernel.org
https://git.kernel.org/stable/c/b0d4d5cb846a1ddb7aaab9adfb5986e4540e6e5f kernel.org
https://git.kernel.org/stable/c/cedff600f1642aa982178503552f0d007bc829c8 kernel.org
https://git.kernel.org/stable/c/db231af842868268839f9f9619c68cb27830d8be kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64395
NVD Published Date:
07/25/2026
NVD Last Modified:
07/25/2026
Source:
kernel.org