kernel/sched/fair.c in the Linux kernel before 5.3.9,...
Low severity
Unreviewed
Published
May 24, 2022
to the GitHub Advisory Database
•
Updated Jan 30, 2023
Description
Published by the National Vulnerability Database
Dec 22, 2019
Published to the GitHub Advisory Database
May 24, 2022
Last updated
Jan 30, 2023
kernel/sched/fair.c in the Linux kernel before 5.3.9, when cpu.cfs_quota_us is used (e.g., with Kubernetes), allows attackers to cause a denial of service against non-cpu-bound applications by generating a workload that triggers unwanted slice expiration, aka CID-de53fd7aedb1. (In other words, although this slice expiration would typically be seen with benign workloads, it is possible that an attacker could calculate how many stray requests are required to force an entire Kubernetes cluster into a low-performance state caused by slice expiration, and ensure that a DDoS attack sent that number of stray requests. An attack does not affect the stability of the kernel; it only causes mismanagement of application execution.)
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