Bug 2360229 (CVE-2025-22037)

Summary: CVE-2025-22037 kernel: ksmbd: fix null pointer dereference in alloc_preauth_hash()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-04-16 15:03:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix null pointer dereference in alloc_preauth_hash()

The Client send malformed smb2 negotiate request. ksmbd return error
response. Subsequently, the client can send smb2 session setup even
thought conn->preauth_info is not allocated.
This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore
session setup request if smb2 negotiate phase is not complete.
Comment 1 Avinash Hanwate 2025-04-17 12:32:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041658-CVE-2025-22037-d1bb@gregkh/T