How severe is CVE-2020-27534?

CVE-2020-27534 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-27534 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27534?

CVE-2020-27534 affects Docker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27534?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-27534 published?

CVE-2020-27534 was published on 2020-12-30 and last updated on 2026-06-17.

CVE-2020-27534

CVE-2020-27534 is a medium-severity vulnerability in Docker with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Docker
Published: 2020-12-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-27534?: CVE-2020-27534 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-27534 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27534?: CVE-2020-27534 affects Docker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27534?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-27534 published?: CVE-2020-27534 was published on 2020-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:docker:docker:*:*:*:*:*:*:*:*

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