PT-2026-64609 · Linux · Linux
CVE-2026-64388
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Published
2026-07-25
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Updated
2026-07-25
None
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In the Linux kernel, the following vulnerability has been resolved:
smb/client: fix chown/chgrp with SMB3 POSIX Extensions
Ownership (chown) and group (chgrp) modifications were being ignored when
mounting with SMB3 POSIX Extensions unless CIFS MOUNT CIFS ACL or
CIFS MOUNT MODE FROM SID were also explicitly set.
Fix this by checking for posix extensions in cifs setattr nounix() when
updating UID and GID, ensuring that id mode to cifs acl() is called to map
and set the ownership/group information on the server.
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Related Identifiers
Affected Products
Linux