Bug 2324873 (CVE-2024-50241)

Summary: CVE-2024-50241 kernel: NFSD: Initialize struct nfsd4_copy earlier
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, rhel-process-autobot, vkumar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Network File System Daemon (NFSD) component. This vulnerability occurs due to the `struct nfsd4_copy` not being properly initialized, specifically its reference count (`refcount`) and asynchronous copies (`async_copies`) fields. An error during the `nfsd4_copy()` operation can lead to a reference count underflow, which may result in a system crash or denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2325094    
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Description OSIDB Bzimport 2024-11-09 11:02:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

NFSD: Initialize struct nfsd4_copy earlier

Ensure the refcount and async_copies fields are initialized early.
cleanup_async_copy() will reference these fields if an error occurs
in nfsd4_copy(). If they are not correctly initialized, at the very
least, a refcount underflow occurs.
Comment 1 Avinash Hanwate 2024-11-11 05:21:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024110933-CVE-2024-50241-9744@gregkh/T