Bug 2363403 (CVE-2022-49791)

Summary: CVE-2022-49791 kernel: io_uring: fix multishot accept request leaks
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-01 15:03:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

io_uring: fix multishot accept request leaks

Having REQ_F_POLLED set doesn't guarantee that the request is
executed as a multishot from the polling path. Fortunately for us, if
the code thinks it's multishot issue when it's not, it can only ask to
skip completion so leaking the request. Use issue_flags to mark
multipoll issues.
Comment 1 Avinash Hanwate 2025-05-02 04:05:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050122-CVE-2022-49791-3e63@gregkh/T