Bug 2327172 (CVE-2024-50285)

Summary: CVE-2024-50285 kernel: ksmbd: check outstanding simultaneous SMB operations
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2327247    
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Description OSIDB Bzimport 2024-11-19 02:01:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: check outstanding simultaneous SMB operations

If Client send simultaneous SMB operations to ksmbd, It exhausts too much
memory through the "ksmbd_work_cache”. It will cause OOM issue.
ksmbd has a credit mechanism but it can't handle this problem. This patch
add the check if it exceeds max credits to prevent this problem by assuming
that one smb request consumes at least one credit.
Comment 1 Avinash Hanwate 2024-11-19 05:56:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024111946-CVE-2024-50285-6013@gregkh/T