CVE-2018-20699

Severity: medium (CVSS 4.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-01-12 · updated 2026-06-17
Weakness: CWE-400

Description

Docker Engine before 18.09 allows attackers to cause a denial of service (dockerd memory consumption) via a large integer in a --cpuset-mems or --cpuset-cpus value, related to daemon/daemon_unix.go, pkg/parsers/parsers.go, and pkg/sysinfo/sysinfo.go.

Affected products

Docker Engine: before 18.09 — fixed in 18.09
RedHat Enterprise Linux Server: 7.0

How to fix

Upgrade to a fixed version: Docker Engine 18.09. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2019:0487
https://github.com/docker/engine/pull/70
https://github.com/moby/moby/pull/37967
https://access.redhat.com/errata/RHSA-2019:0487
https://github.com/docker/engine/pull/70
https://github.com/moby/moby/pull/37967

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