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Debian: CVE-2022-4696: linux, linux-5.10 -- security update

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Debian: CVE-2022-4696: linux, linux-5.10 -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/11/2023
Created
01/25/2023
Added
01/25/2023
Modified
11/08/2023

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. We recommend upgrading to version 5.10.160 or above

Solution(s)

  • debian-upgrade-linux
  • debian-upgrade-linux-5-10

References

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