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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. We recommend upgrading to version 5.10.160 or above
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13 Jun 2023 07:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.17.8
EPSS0.00019
SSVC