CVE-2019-19922

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.)

• linux linux kernel (< 5.3.9) • oracle sd-wan edge 8.2 • canonical ubuntu linux 18.04 • canonical ubuntu linux 19.04 • debian debian linux 8.0 • netapp active iq unified manager • netapp cloud backup • netapp data availability services • netapp e-series santricity os controller (>= 11.0 <= 11.70.2) • netapp fas\/aff baseboard management controller • netapp hci baseboard management controller h610s • netapp solidfire \& hci management node • netapp steelstore cloud integrated storage • netapp aff baseboard management controller a700 • netapp solidfire baseboard management controller