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Debian: CVE-2023-0240: linux, linux-5.10 -- security update

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Debian: CVE-2023-0240: linux, linux-5.10 -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/30/2023
Created
03/07/2023
Added
03/06/2023
Modified
11/08/2023

Description

There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.

Solution(s)

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

References

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