CVE-2016-1646

Exp

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.

Published: 2016-03-29 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-1646 is rated Critical Active Threat (95.1/100): CVSS High severity, with high exploitation likelihood (EPSS 66.91%, 99th percentile). CISA KEV confirms active exploitation (added 2022-06-08) affecting Google / Chromium V8. a weakness (CWE-125) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2016-1646

Name: Google Chromium V8 Out-of-Bounds Read Vulnerability · CISA KEV detail

Exploit added: 2022-06-08

Action due: 2022-06-22

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2016-1646

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-1646

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-22 66.51% 66.91% +0.40%
2 2026-03-04 68.42% 66.51% -1.91%
3 2026-03-01 — 68.42% —

Full EPSS history (59 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-1646

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2016-1646

OS Trackers for CVE-2016-1646

vendor priority summary link
gentoo normal CVE-2016-1646: 1 GLSA(s) (201605-02), 1 atom(s) (www-client/chromium); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-1646
redhat high — https://access.redhat.com/security/cve/CVE-2016-1646
ubuntu medium CVE-2016-1646 medium priority: Ubuntu including 4 source packages (chromium-browser, libv8, libv8-3.14, oxide-qt), 40 status rows across 10 suites (artful, bionic, cosmic, precise, trusty, upstream, wily, xenial, yakkety, zesty): released 16, DNE 13, ignored 9, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2016-1646

Affected software / configurations for CVE-2016-1646

Vendor Product Version Raw CPE
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 15.10 cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
google chrome < 49.0.2623.108 cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
suse package_hub — cpe:2.3:a:suse:package_hub:-:*:*:*:*:*:*:*
opensuse leap 42.1 cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 6.0 cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_eus 6.7 cpe:2.3:o:redhat:enterprise_linux_eus:6.7:*:*:*:*:*:*:*
redhat enterprise_linux_server 6.0 cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 6.0 cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

References for CVE-2016-1646

URL Tags
http://googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html Release Notes Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00000.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00001.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00039.html Mailing List Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0525.html Third Party Advisory
http://www.debian.org/security/2016/dsa-3531 Mailing List Third Party Advisory
http://www.securitytracker.com/id/1035423 Broken Link Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2955-1 Third Party Advisory
https://code.google.com/p/chromium/issues/detail?id=594574 Exploit Issue Tracking Mailing List
https://codereview.chromium.org/1804963002/ Patch
https://security.gentoo.org/glsa/201605-02 Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-1646 US Government Resource
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