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CVE-2016-5203

27
FAUCET Score

CVE-2016-5203 is a use-after-free vulnerability in PDFium affecting Google Chrome versions prior to 55.0.2883.75 on Mac, Windows, and Linux, and 55.0.2883.84 on Android. This high-severity flaw (CVSS 8.8) allows a remote attacker to potentially exploit heap corruption by tricking a user into opening a specially crafted PDF file. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered significant community discussion and media coverage, indicating its importance.

Impacted Technologies

VendorProductVersion(s)CPE
<= 54.0.2840.99CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.10%
Probability of exploitation in next 30 days
EPSS Percentile
62.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0110 is in the 61st percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: chromium-browser-0:55.0.2883.75-1.el6
View patch

Vendor Advisories (1)

redhatCVE-2016-5203Important

chromium-browser: use after free in pdfium

Dec 1, 2016

References

rhn.redhat.com / errata/RHSA-2016-2919.html
chromereleases.googleblog.com / 2016/12/stable-channel-update-for-desktop.html
crbug.com / 644219
security.gentoo.org / glsa/201612-11
securityfocus.com / bid/94633