eventpoll: Fix semi-unbounded recursion

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CVE-2025-38614

The CVE CVE-2025-38614 affects the Linux kernel eventpoll/epoll component. The vulnerability stemmed from semi-unbounded recursion in ep_loop_check_proc() and related upwards/downwards path checks, enabling depths up to ~500 in certain graphs before a fix. The fix introduces subtree depth trackin...

PT-2025-33812

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The Linux kernel contains a flaw within the eventpoll subsystem that could allow for semi-unbounded recursion. The issue stems from insufficient depth checks when creating graph edges...