Is CVE-2016-9427 in the CISA KEV catalog?

No. CVE-2016-9427 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-9427?

CVE-2016-9427 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2016-9427?

CVE-2016-9427 has an EPSS score of 4.14% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-9427?

Upgrade libgc on debian 11 to 1:7.6.4-0.3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2016-9427

CRITICALEPSS 90th pctl

9.8

CVSS v3

NVD

Description

Integer overflow vulnerability in bdwgc before 2016-09-27 allows attackers to cause client of bdwgc denial of service (heap buffer overflow crash) and possibly execute arbitrary code via huge allocation.

CWE-119Buffer Overflow CWE-190Integer Overflow

How to fix

Remediation Available

libgcDebian

Fixed in:1:7.6.4-0.3CVE-2016-9427

libgcUbuntu

Fixed in:1:7.2d-5ubuntu2.1USN-3197-1

Fixed in:1:7.4.2-7.3ubuntu0.1USN-3197-1

libgc1c2Ubuntu

Fixed in:1:7.2d-5ubuntu2.1USN-3197-1

Fixed in:1:7.4.2-7.3ubuntu0.1USN-3197-1

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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

4.14%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory5

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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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.