OVSwrap (CVE-2026-64531): How a 13-Year-Old Open vSwitch Bug Became a Reliable Linux Root Exploit (wp.me)

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CVE-2026-64531 (OVSwrap) is a recently disclosed Linux kernel privilege escalation vulnerability affecting the Open vSwitch datapath. The flaw is particularly notable because the vulnerable code had existed for roughly 13 years but remained practically unreachable until a 2025 change removed a long-standing size limit, exposing an integer wraparound that can lead to kernel memory corruption. The published proof of concept also demonstrates an unusually reliable exploitation path compared to many traditional kernel exploits

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this post was submitted on 05 Aug 2026

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