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CVE-2015-6778

19
FAUCET Score

CVE-2015-6778 describes an out-of-bounds memory access vulnerability in the CJBig2_SymbolDict class within PDFium, affecting Google Chrome versions prior to 47.0.2526.73. This flaw allows remote attackers to trigger a denial of service or potentially other unspecified impacts by presenting a crafted PDF document utilizing JBIG2 compression. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. While there is no evidence of active exploitation, public exploit code, or Metasploit modules, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 46.0.2490.86CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 57th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: chromium-browser-0:47.0.2526.73-1.el6
View patch

Vendor Advisories (1)

redhatCVE-2015-6778Moderate

chromium-browser: Out of bounds access in PDFium

Dec 1, 2015

References

googlechromereleases.blogspot.com / 2015/12/stable-channel-update.html
lists.opensuse.org / opensuse-security-announce/2015-12/msg00016.html
lists.opensuse.org / opensuse-security-announce/2015-12/msg00017.html
code.google.com / p/chromium/issues/detail
codereview.chromium.org / 1388203003
security.gentoo.org / glsa/201603-09
debian.org / security/2015/dsa-3415
securityfocus.com / bid/78416
securitytracker.com / id/1034298