High severity8.1NVD Advisory· Published Sep 24, 2026· Updated Oct 30, 2026
CVE-2026-93786
CVE-2026-93786
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: preserve VFS inherited POSIX ACL mask
The VFS initializes a child's POSIX ACL from the parent's default ACL and the requested creation mode. Do not mutate the parent ACL or overwrite the child's VFS-computed access and default ACLs afterwards.
This preserves restrictive ACL_MASK entries and prevents SMB object creation from widening effective permissions.
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Affected products
3Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0nvd
- git.kernel.org/stable/c/4a19bb1c45667f5a5f6eff9cf6648e0f692d046fnvd
- git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70nvd
- git.kernel.org/stable/c/8493da704275ca5ab67fb88c0ae7b71576e91951nvd
- git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68anvd
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