Bug 2373409 (CVE-2022-50107)

Summary: CVE-2022-50107 kernel: cifs: Fix memory leak when using fscache
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
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the cifs module in the Linux kernel. A missing decrement of the reference count will cause a memory leak, potentially impacting system performance and resulting in a denial of service.
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Description OSIDB Bzimport 2025-06-18 12:01:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix memory leak when using fscache

If we hit the 'index == next_cached' case, we leak a refcount on the
struct page.  Fix this by using readahead_folio() which takes care of
the refcount for you.
Comment 1 Avinash Hanwate 2025-06-20 11:56:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061806-CVE-2022-50107-76ef@gregkh/T