DirtyClone Linux Kernel Flaw Enables Root Escalation via Cloned Network Packets
CVE-2026-43503 (CVSS 8.8) allows local users to gain root by corrupting file-backed memory through cloned network packets, exploiting a missing shared-frag flag in kernel packet handling. The flaw affects multi-tenant systems where unprivileged namespaces are enabled, including CI runners and Kubernetes clusters. A patch was merged in Linux v7.1-rc5 on May 21, 2026. Read more