CVE-2026-64388
- Source
- https://cve.org/CVERecord?id=CVE-2026-64388
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64388.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64388
- Downstream
- Published
- 2026-07-25T08:50:36.202Z
- Modified
- 2026-07-28T04:02:47.893392734Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- smb/client: fix chown/chgrp with SMB3 POSIX Extensions
- Details
-
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 CIFSMOUNTCIFSACL or CIFSMOUNTMODEFROM_SID were also explicitly set.
Fix this by checking for posixextensions in cifssetattrnounix() when updating UID and GID, ensuring that idmodetocifs_acl() is called to map and set the ownership/group information on the server.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64388.json" }- References
-
- https://git.kernel.org/stable/c/550cfb8a81181331d4d0f76ab75ee58a0bf41e3e
- https://git.kernel.org/stable/c/760ef2c579c2609cf17fb1cd5392f64d42d43d33
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64388.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64388
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git