Is CVE-2016-1567 in the CISA KEV catalog?

No. CVE-2016-1567 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1567?

CVE-2016-1567 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2016-1567?

CVE-2016-1567 has an EPSS score of 2.64% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1567?

Upgrade chrony on debian 11 to 2.2.1-1 or later.

CVE & CISA-KEV Catalog

CVE-2016-1567

HIGHEPSS 84th pctl

8.1

CVSS v3

NVD

Description

chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."

CWE-254

How to fix

Remediation Available

chronyDebian

Fixed in:2.2.1-1CVE-2016-1567

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.64%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Patch1

lists.fedoraproject.org

Exploit1

talosintel.com

Vendor Advisory1

chrony.tuxfamily.org

Other references1

lists.fedoraproject.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.