CVE-2020-27534

Name: CVE-2020-27534
Creator: NVD / NIST
Published: 2020-12-30T23:15:15.297+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.75%

Last modified Jun 17, 2026

CVE-2020-27534 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. util/binfmt_misc/check.go in Builder in Docker Engine before 19.03.9 calls os.OpenFile with a potentially unsafe qemu-check temporary pathname, constructed with an empty first argument in an ioutil.TempDir call.. EPSS estimates a 1.75% chance of exploitation in the next 30 days.

Description

util/binfmt_misc/check.go in Builder in Docker Engine before 19.03.9 calls os.OpenFile with a potentially unsafe qemu-check temporary pathname, constructed with an empty first argument in an ioutil.TempDir call.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.75%

74.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Docker	Docker	< 19.03.9

References

http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Release Notes, Third Party Advisory
https://github.com/moby/buildkit/pull/1462Third Party Advisory
https://github.com/moby/moby/pull/40877Third Party Advisory
https://golang.org/pkg/io/ioutil/#TempDirThird Party Advisory
https://golang.org/pkg/os/#TempDirThird Party Advisory
http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Release Notes, Third Party Advisory
https://github.com/moby/buildkit/pull/1462Third Party Advisory
https://github.com/moby/moby/pull/40877Third Party Advisory
https://golang.org/pkg/io/ioutil/#TempDirThird Party Advisory
https://golang.org/pkg/os/#TempDirThird Party Advisory

Timeline

Published: Dec 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27534?

How severe is CVE-2020-27534?

CVE-2020-27534 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.75% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27534?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27534?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST