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Debian: CVE-2022-3176: linux, linux-5.10 -- security update

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Debian: CVE-2022-3176: linux, linux-5.10 -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/16/2022
Created
11/02/2022
Added
11/01/2022
Modified
11/04/2022

Description

There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659

Solution(s)

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

References

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