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In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem (\"attack 2\"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run (\"attack 1\"). 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