CVE-2020-27534

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.

Published: 2020-12-30 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-27534 is rated Moderate Risk (48.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.75%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-27534

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.77% 1.75% +0.97%
2 2025-12-28 0.63% 0.77% +0.14%
3 2025-12-27 — 0.63% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-27534

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-27534

GitHub Security Advisory for CVE-2020-27534

OS Trackers for CVE-2020-27534

vendor priority summary link
alpine medium CVE-2020-27534: 1 source package rows (docker); 6 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 6. https://security.alpinelinux.org/vuln/CVE-2020-27534
debian unimportant CVE-2020-27534 unimportant priority: Debian including 1 source packages (docker.io), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-27534
redhat medium — https://access.redhat.com/security/cve/CVE-2020-27534
suse low CVE-2020-27534 severity low: SUSE including 7 source package names (docker, docker-bash-completion, …), 25 product×package rows across 7 product lines (SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS, SUSE Linux Enterprise Module for Containers 12, … (7 product lines)): Known Not Affected 25. https://www.suse.com/security/cve/CVE-2020-27534/
ubuntu medium CVE-2020-27534 medium priority: Ubuntu including 1 source packages (docker.io), 6 status rows across 6 suites (bionic, focal, groovy, trusty, upstream, xenial): not-affected 4, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2020-27534

Affected software / configurations for CVE-2020-27534

Vendor Product Version Raw CPE
docker docker < 19.03.9 cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*

References for CVE-2020-27534

cvelogic Threat Intelligence