CVE-2026-64138

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/18d8db24b0a5b7be4829238dd4022236df02d421	Patch
https://git.kernel.org/stable/c/1c9d0646a9959752f11ca1080dc1ff26bd1756cb	Patch
https://git.kernel.org/stable/c/69f030cf95488ae1186c72ac8c66fd279664ea7f	Patch
https://git.kernel.org/stable/c/8efbea0253b7fa2d1960cab0fed36544ca0b41ab
https://git.kernel.org/stable/c/f0e5c9c663badc9982e6941322eef1cb17de0f11	Patch
https://git.kernel.org/stable/c/f7c4dee323d9176b8d3f5c69018ee57ae0d4653c

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::

History

30 Oct 2026, 13:19

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/f7c4dee323d9176b8d3f5c69018ee57ae0d4653c -

21 Oct 2026, 13:19

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/8efbea0253b7fa2d1960cab0fed36544ca0b41ab -

Information

Published : 2026-07-19 16:17

Updated : 2026-10-30 13:19

NVD link : CVE-2026-64138

Mitre link : CVE-2026-64138

CVE.ORG link : CVE-2026-64138

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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