CVE-2026-64138 is a vulnerability in Linux Kernel
Published on July 19, 2026
ksmbd: validate SID in parent security descriptor during ACL inheritance
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate SID in parent security descriptor during ACL inheritance
Introduce smb_validate_ntsd_sid() helper to safely validate Owner SID
and Group SID inside the NT Security Descriptor (smb_ntsd) retrieved
from the parent directory.
Products Associated with CVE-2026-64138
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below f0e5c9c663badc9982e6941322eef1cb17de0f11 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 18d8db24b0a5b7be4829238dd4022236df02d421 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 1c9d0646a9959752f11ca1080dc1ff26bd1756cb is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 69f030cf95488ae1186c72ac8c66fd279664ea7f is affected.
- Before 6.12.92 is affected.
- Before 6.18.34 is affected.
- Before 7.0.11 is affected.
- Version 6.12.92, <= 6.12.* is unaffected.
- Version 6.18.34, <= 6.18.* is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.