Debian: CVE-2024-38618: linux -- security update

Debian: CVE-2024-38618: linux -- security update

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

06/19/2024

Created

06/28/2024

Added

06/27/2024

Modified

06/27/2024

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, wherethe 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)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2024-38618
• CVE - 2024-38618
• DLA-3840-1