Vulnerability CVE-2024-38618
Published: 2024-06-19

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.

 References:
https://git.kernel.org/stable/c/68396c825c43664b20a3a1ba546844deb2b4e48f
https://git.kernel.org/stable/c/74bfb8d90f2601718ae203faf45a196844c01fa1
https://git.kernel.org/stable/c/bdd0aa055b8ec7e24bbc19513f3231958741d0ab
https://git.kernel.org/stable/c/83f0ba8592b9e258fd80ac6486510ab1dcd7ad6e
https://git.kernel.org/stable/c/ceab795a67dd28dd942d0d8bba648c6c0f7a044b
https://git.kernel.org/stable/c/2c95241ac5fc90c929d6c0c023e84bf0d30e84c3
https://git.kernel.org/stable/c/abb1ad69d98cf1ff25bb14fff0e7c3f66239e1cd
https://git.kernel.org/stable/c/4a63bd179fa8d3fcc44a0d9d71d941ddd62f0c4e
Copyright 2026, cxsecurity.com

 

Back to Top