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[帮助文档] 如何更新Linux内核漏洞（CVE-2020-14386）

9月4日，Linux社区公布了编号为CVE-2020-14386的内核漏洞。该漏洞源自Linux内核net/packet/af_packet.c，攻击者可以通过该漏洞实现越界写，可能造成提权和容器逃逸等风险。

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