Bug 2389457 (CVE-2025-38561)

Summary: CVE-2025-38561 kernel: ksmbd: fix Preauh_HashValue race condition
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-08-19 18:01:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix Preauh_HashValue race condition

If client send multiple session setup requests to ksmbd,
Preauh_HashValue race condition could happen.
There is no need to free sess->Preauh_HashValue at session setup phase.
It can be freed together with session at connection termination phase.
Comment 1 Alexander B 2025-08-20 10:09:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025081907-CVE-2025-38561-0f75@gregkh/T