Bug 2383451 (CVE-2025-38430)

Summary: CVE-2025-38430 kernel: nfsd: nfsd4_spo_must_allow() must check this is a v4 compound request
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-25 15:01:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nfsd: nfsd4_spo_must_allow() must check this is a v4 compound request

If the request being processed is not a v4 compound request, then
examining the cstate can have undefined results.

This patch adds a check that the rpc procedure being executed
(rq_procinfo) is the NFSPROC4_COMPOUND procedure.
Comment 1 Jon Moroney 2025-07-25 18:02:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072556-CVE-2025-38430-dafd@gregkh/T