Use Count Error in Oracle Linux UEK6 U3 Leads to Denial of Service

CVE-2022-21504

Summary

A critical issue has been identified in Oracle Linux UEK6 U3 where an inappropriate file descriptor count management leads to a use count error. This flaw permits a socket's file descriptor to be prematurely closed and freed while it is still in operation. Attackers with local access can exploit this vulnerability to manipulate the socket, potentially triggering a denial of service. This situation arises due to concurrency issues in the kernel's file descriptor management.

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