CVE-2026-64395
Received Received - Intake

BaseFortify

Publication date: 2026-07-25

Last updated on: 2026-07-25

Assigner: kernel.org

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.

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Meta Information

Published
2026-07-25
Last Modified
2026-07-25
Generated
2026-07-25
EPSS Evaluated
N/A
NVD
CVE-2026-64395
EUVD
EUVD-2026-48939

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Currently, no data is known.

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Exploitability

CWE
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CWE ID Description
CWE-UNKNOWN

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