CVE - CVE-2019-19922

CVE-ID
CVE-2019-19922	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.)
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20200204-0002/ URL:https://security.netapp.com/advisory/ntap-20200204-0002/ MISC:https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9 URL:https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9 MISC:https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=de53fd7aedb100f03e5d2231cfce0e4993282425 URL:https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=de53fd7aedb100f03e5d2231cfce0e4993282425 MISC:https://github.com/kubernetes/kubernetes/issues/67577 URL:https://github.com/kubernetes/kubernetes/issues/67577 MISC:https://github.com/torvalds/linux/commit/de53fd7aedb100f03e5d2231cfce0e4993282425 URL:https://github.com/torvalds/linux/commit/de53fd7aedb100f03e5d2231cfce0e4993282425 MISC:https://relistan.com/the-kernel-may-be-slowing-down-your-app URL:https://relistan.com/the-kernel-may-be-slowing-down-your-app MISC:https://www.oracle.com/security-alerts/cpuApr2021.html URL:https://www.oracle.com/security-alerts/cpuApr2021.html MLIST:[debian-lts-announce] 20200118 [SECURITY] [DLA 2068-1] linux security update URL:https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html UBUNTU:USN-4226-1 URL:https://usn.ubuntu.com/4226-1/
Assigning CNA
MITRE Corporation
Date Record Created
20191222	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20191222)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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