Description
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.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/550cfb8a81181331d4d0f76ab75ee58a0bf41e3e Patch
- git.kernel.org/stable/c/760ef2c579c2609cf17fb1cd5392f64d42d43d33 Patch
- git.kernel.org/stable/c/27ead8c5418af6bfab711079fecb9414d78d4cae
- git.kernel.org/stable/c/3eaec47518e126e6dcd1a48521d740278073f0ec
- git.kernel.org/stable/c/6825a45f6b8ef76b0ee32649ec3d6e39ca143a18
- git.kernel.org/stable/c/c0fe1118a1471d459f76c3e70ff2abbf784ce6bf
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 14 November 2026
- CWE
- CWE-682
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