CVE-2016-6299: The scm plug-in in mock might allow attackers to bypass the intended chroot protection mechanism and gain root

This month

HIGH 7.8MITIGATEMITIGATE

CVE-2016-6299 is a high-severity flaw (CVSS 7.8) affecting fedora, scm plugin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The scm plug-in in mock might allow attackers to bypass the intended chroot protection mechanism and gain root privileges via a crafted spec file.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-264
Published	2017-04-14
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · mock project

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

Am I affected?

Timeline

2017-04-14 18:59 UTCPublished CVE record published
2026-06-17 00:50 UTCUpdated Record last modified

fedoraproject fedora MITIGATE

Affected: 23 · 24 · 25

Fixed in: no fixed release known

Safe to downgrade to: a release before 23

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

mock project scm plugin 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 scm-plugin || rpm -q scm-plugin || scm-plugin --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-2016-6299?

fedora: mitigate or apply the listed mitigation; scm plugin: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-6299 being exploited?

CVE-2016-6299 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-2016-6299 affect?

CVE-2016-6299 affects fedora, scm plugin. Severity is high (CVSS 7.8). The scm plug-in in mock might allow attackers to bypass the intended chroot protection mechanism and gain root privileges via a crafted spec file.

How urgent is CVE-2016-6299?

Priority 52/100. High severity; Public exploit reference

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References

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