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CVE 2021 22555

CVE-2021-22555

CVE-2021-22555 is a 15 years old heap out-of-bounds write vulnerability in Linux Netfilter that is powerful enough to bypass all modern security mitigations and achieve kernel code execution. It was used to break the kubernetes pod isolation of the kCTF cluster and won 10000$ for charity (where Google will match and double the donation to 20000$).