Vulnerability details
CVE-2026-93786
Linux Linux
ksmbd: preserve VFS inherited POSIX ACL mask
CVSS 3.1
8.1High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 5.15 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d ≤ v < 8493da704275ca5ab67fb88c0ae7b71576e91951 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d ≤ v < 4a19bb1c45667f5a5f6eff9cf6648e0f692d046f | CVEProject cvelistV5 (CNA) |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d ≤ v < 591acf171644de590cda245fd8595b473a1beb70 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d ≤ v < 0093909becbda22b62b39b654dbc607faed59cd0 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | f44158485826c076335d6860d35872271a83791d ≤ v < e148e567a9252643baa125cb65d7ae9c2c6cf68a | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/8493da704275ca5ab67fb88c0ae7b71576e91951
- 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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Details
- Published
- 2026-09-24
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.34%
Probability of exploitation in 30 days
27.8%
Percentile (among all CVEs)
Weaknesses (CWE)
- —