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CVE-2025-38614 is an insufficient recursion-depth enforcement flaw in the Linux kernel eventpoll (epoll) subsystem. The epoll graph-validation logic in ep_loop_check_proc() detected loops but did not fully account for upward paths and could undercount depth when previously visited subtrees had multiple downward paths of differing lengths. A subsequent reverse-path check occurred only after edge creation and did not fully constrain paths involving non-epoll files. Consequently, epoll instance graphs could exceed the intended nesting constraint; recursion of approximately 500 levels was demonstrated on Linux kernel v6.15. The fix records subtree depths, determines maximum upward traversal depth, and enforces a maximum path length of EP_MAX_NESTS edges between epoll nodes.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel eventpoll semi-unbounded recursion vulnerability.
Linux kernel eventpoll semi-unbounded recursion vulnerability.
Linux kernel eventpoll flaw involving semi-unbounded recursion.
A Linux kernel eventpoll flaw involving semi-unbounded recursion.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.