{"schemaVersion":3,"id":"CVE-2022-4696","aliases":["UBUNTU-CVE-2022-4696","DEBIAN-CVE-2022-4696"],"status":"published","duplicateOf":null,"title":null,"description":"There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. 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