CVE-2026-93786
8.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 4a19bb1c45667f5a5f6eff9cf6648e0f692d046f | affected |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 591acf171644de590cda245fd8595b473a1beb70 | affected |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < 0093909becbda22b62b39b654dbc607faed59cd0 | affected |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d < e148e567a9252643baa125cb65d7ae9c2c6cf68a | affected |
| Linux | Linux | 5.15 | affected |
| Linux | Linux | 0 < 5.15 | unaffected |
| Linux | Linux | 6.6.158 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.111 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.53 <= 6.18.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/4a19bb1c45667f5a5f6eff9cf6648e0f692d046f
- https://git.kernel.org/stable/c/591acf171644de590cda245fd8595b473a1beb70
- https://git.kernel.org/stable/c/0093909becbda22b62b39b654dbc607faed59cd0
- https://git.kernel.org/stable/c/e148e567a9252643baa125cb65d7ae9c2c6cf68a
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