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CVE-2026-82312 is an improper permission assignment vulnerability in OpenVPN 2.x on Windows. Affected releases create named IPC objects, including a service-exit event and a synchronization semaphore, with NULL discretionary access control lists (DACLs). The NULL DACL grants local users unrestricted access to these objects, allowing one logged-in user to disrupt another user’s OpenVPN process by signaling the exit event or preventing access to the semaphore.
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No public exploit code observed for this vulnerability.
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5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows local denial-of-service flaw caused by NULL DACLs on OpenVPN service objects. A local user can block the guard semaphore or trigger spurious service events, disrupting another user's OpenVPN process.
A Windows OpenVPN local denial-of-service vulnerability caused by NULL DACLs on system objects, permitting one logged-in user to interfere with another user's OpenVPN process by blocking a semaphore or triggering spurious events.
A local authenticated denial-of-service vulnerability in OpenVPN for Windows caused by NULL discretionary access control lists (DACLs) on named IPC objects.
A medium-severity local denial-of-service vulnerability in OpenVPN 2.x for Windows caused by creation of the service exit event and netsh.exe guard semaphore with NULL DACLs. A local low-privileged user can block the semaphore or signal the event, disrupting other users' OpenVPN processes.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.