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An attacker in a\nguest VM could use this to read or write portions of the host's physical\nmemory.(CVE-2021-3656)\n\nAndy Nguyen discovered that the netfilter subsystem in the Linux kernel\ncontained an out-of-bounds write in its setsockopt() implementation. A\nlocal attacker could use this to cause a denial of service (system crash)\nor possibly execute arbitrary code.(CVE-2021-22555)\n\nIt was discovered that the virtual file system implementation in the Linux\nkernel contained an unsigned to signed integer conversion error. 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