CVE-2026-93786
ksmbd: preserve VFS inherited POSIX ACL mask
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 24, 2026 |
| Last Updated | Oct 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
f44158485826c076335d6860d35872271a83791d < 8493da704275ca5ab67fb88c0ae7b71576e91951 f44158485826c076335d6860d35872271a83791d < 4a19bb1c45667f5a5f6eff9cf6648e0f692d046f f44158485826c076335d6860d35872271a83791d < 591acf171644de590cda245fd8595b473a1beb70 f44158485826c076335d6860d35872271a83791d < 0093909becbda22b62b39b654dbc607faed59cd0 f44158485826c076335d6860d35872271a83791d < e148e567a9252643baa125cb65d7ae9c2c6cf68a
Linux / Linux
5.15
References
git.kernel.org: https://git.kernel.org/stable/c/8493da704275ca5ab67fb88c0ae7b71576e91951 git.kernel.org: https://git.kernel.org/stable/c/4a19bb1c45667f5a5f6eff9cf6648e0f692d046f git.kernel.org: https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70 git.kernel.org: https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0 git.kernel.org: https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a