CVE-2026-64138 Details
Description
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.
A vulnerability in the Linux kernel's ksmbd component has been addressed, which involved improper validation of Security Identifiers (SIDs) in the parent security descriptor during Access Control List (ACL) inheritance. This issue could potentially lead to incorrect ACL handling. The vulnerability was present in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/18d8db24b0a5b7be4829238dd4022236df02d421 | kernel.org | Patch |
| https://git.kernel.org/stable/c/1c9d0646a9959752f11ca1080dc1ff26bd1756cb | kernel.org | Patch |
| https://git.kernel.org/stable/c/69f030cf95488ae1186c72ac8c66fd279664ea7f | kernel.org | Patch |
| https://git.kernel.org/stable/c/f0e5c9c663badc9982e6941322eef1cb17de0f11 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.15, < 6.12.92 >= 6.13, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 18, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |