Bug 2385248 (CVE-2023-3867)

Summary: CVE-2023-3867 kernel: Out of bounds read in smb2_sess_setup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel. The ksmbd component does not consider the case where the smb2 session setup is in a compound request. This issue may result in an out-of-bounds read issue in the smb2_sess_setup() function.
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Description OSIDB Bzimport 2025-07-30 18:45:58 UTC 
In the Linux kernel, this specific flaw exists within the handling of session setup commands in the ksmbd component. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.