KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2016-1646

Chrome Denial of Service

Google / Chrome

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Severity
CVSS 8.8 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
48.1%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2016-1646 is an unauthenticated vulnerability affecting Google Chrome. The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Google / Chrome.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Chrome Denial of Service

The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly consider element data types, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via crafted JavaScript code.

View vendor advisory (opens in new tab)
Published
29 Mar 2016
Exploitation Reported
08 Jun 2022
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
Required

Tags

cisa java

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2016-1646
  • RHSA-2016:0525 rhn.redhat.com · Vendor Advisory http://rhn.redhat.com/errata/RHSA-2016-0525.html
  • openSUSE-SU-2016:0929 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00000...
  • openSUSE-SU-2016:1059 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00039...
  • DSA-3531 debian.org · Vendor Advisory http://www.debian.org/security/2016/dsa-3531
  • openSUSE-SU-2016:0930 lists.opensuse.org · Vendor Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00001...
  • USN-2955-1 ubuntu.com · Vendor Advisory http://www.ubuntu.com/usn/USN-2955-1
  • GLSA-201605-02 security.gentoo.org · Vendor Advisory https://security.gentoo.org/glsa/201605-02
  • 1035423 securitytracker.com · VDB Entry http://www.securitytracker.com/id/1035423
  • googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html googlechromereleases.blogspot.com · CVE Record http://googlechromereleases.blogspot.com/2016/03/stable-channel-updat...
  • codereview.chromium.org/1804963002 codereview.chromium.org · CVE Record https://codereview.chromium.org/1804963002/
  • code.google.com/p/chromium/issues/detail code.google.com · CVE Record https://code.google.com/p/chromium/issues/detail?id=594574

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 08 Jun 2022

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CISA First 2022-06-08 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

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

EPSS

48.1%

Weaknesses

Out-of-bounds Read CWE-125

All CVSS Scores

CVSS v3.1 8.8 High

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

CVSS v2.0 9.3 High

AV:N/AC:M/Au:N/C:C/I:C/A:C

Timeline

From disclosure to observed exploitation

  1. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. CVE published

    Vulnerability disclosed publicly

  3. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2016-1646

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2016-1646",
  "confidence": "Confirmed",
  "cvss_score": 8.8,
  "cvss_estimated": false,
  "epss_score": 0.4811,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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