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Oracle Linux: CVE-2024-38618: ELSA-2024-12581: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2024-38618: ELSA-2024-12581: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:M/C:N/I:N/A:C)
Published
06/19/2024
Created
08/20/2024
Added
10/16/2024
Modified
10/17/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Set lower bound of start tick time Currently ALSA timer doesn't have the lower limit of the start tick time, and it allows a very small size, e.g. 1 tick with 1ns resolution for hrtimer. Such a situation may lead to an unexpected RCU stall, where the callback repeatedly queuing the expire update, as reported by fuzzer. This patch introduces a sanity check of the timer start tick time, so that the system returns an error when a too small start size is set. As of this patch, the lower limit is hard-coded to 100us, which is small enough but can still work somehow.

Solution(s)

  • oracle-linux-upgrade-kernel-uek

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