CVE-2020-7669: This affects all versions of package github.com/u-root/u-root/pkg/tarutil

This week

HIGH 7.5REMOTEMITIGATE

CVE-2020-7669 is a high-severity flaw (CVSS 7.5) affecting u-root. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects all versions of package github.com/u-root/u-root/pkg/tarutil. It is vulnerable to both leading and non-leading relative path traversal attacks in tar file extraction.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-22
Published	2020-09-01
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: u-root

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-09-01 14:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

u-root u-root MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy u-root || rpm -q u-root || u-root --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-7669?

u-root: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-7669 being exploited?

CVE-2020-7669 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-7669 affect?

CVE-2020-7669 affects u-root. Severity is high (CVSS 7.5). This affects all versions of package github.com/u-root/u-root/pkg/tarutil. It is vulnerable to both leading and non-leading relative path traversal attacks in tar file extraction.

How urgent is CVE-2020-7669?

Priority 56/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2020-7666 HIGH 7.5 MITIGATE This affects all versions of package github.com/u-root/u-root/pkg/cpio
CVE-2020-7665 HIGH 7.5 MITIGATE This affects all versions of package github.com/u-root/u-root/pkg/uzip

References

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