Bug 2363763 (CVE-2023-53116)

Summary: CVE-2023-53116 kernel: nvmet: avoid potential UAF in nvmet_req_complete()
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, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-02 16:04:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nvmet: avoid potential UAF in nvmet_req_complete()

An nvme target ->queue_response() operation implementation may free the
request passed as argument. Such implementation potentially could result
in a use after free of the request pointer when percpu_ref_put() is
called in nvmet_req_complete().

Avoid such problem by using a local variable to save the sq pointer
before calling __nvmet_req_complete(), thus avoiding dereferencing the
req pointer after that function call.
Comment 1 Avinash Hanwate 2025-05-05 05:47:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050229-CVE-2023-53116-469c@gregkh/T