CVE-2018-20784

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1959Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1971Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2Release Notes, Vendor Advisory
https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0Patch, Third Party Advisory
https://usn.ubuntu.com/4115-1/Third Party Advisory
https://usn.ubuntu.com/4118-1/Third Party Advisory
https://usn.ubuntu.com/4211-1/Third Party Advisory
https://usn.ubuntu.com/4211-2/Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:1959Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1971Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2Release Notes, Vendor Advisory
https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0Patch, Third Party Advisory
https://usn.ubuntu.com/4115-1/Third Party Advisory
https://usn.ubuntu.com/4118-1/Third Party Advisory
https://usn.ubuntu.com/4211-1/Third Party Advisory
https://usn.ubuntu.com/4211-2/Third Party Advisory

Timeline

Published: Feb 22, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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