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CVE-2025-38349 is a use-after-free vulnerability in the Linux kernel eventpoll subsystem. The flaw arises from epoll decrementing the eventpoll object's reference count while still holding the associated ep mutex, and only unlocking the mutex afterward. This ordering is unsafe because mutex unlock operations may still access the mutex structure after the lock has been logically released. In the next-to-last reference case, another execution context can acquire the mutex, drop the remaining reference, and free the underlying eventpoll object while the original context is still completing mutex_unlock() on that same object. The result is a kernel use-after-free condition caused by incorrect object lifetime management and refcount handling around mutex release. The fix moves the reference count decrement outside the mutex-protected region so object lifetime is no longer tied to mutex semantics.
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No public exploit code observed for this vulnerability.
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13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity kernel elevation-of-privilege issue in Net/EPoll subsystems referenced as part of the December 2025 Android bulletin’s kernel bug set.
High-severity Android kernel vulnerability referenced in the December 2025 bulletin as expanding the local kernel privilege-escalation attack surface.
A high-severity use-after-free vulnerability with an attack surface on the epoll system call interface, potentially enabling local privilege escalation or kernel-level memory corruption depending on the affected component.
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.