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CVE-2016-1523

22
FAUCET Score

CVE-2016-1523 describes a denial-of-service vulnerability in Libgraphite's SillMap::readFace function, affecting Graphite 2 1.2.4, Mozilla Firefox before 43.0, and Firefox ESR 38.x before 38.6.1, as well as Debian and Fedora Project products. An unhandled return value allows remote attackers to trigger a NULL pointer dereference and application crash via a crafted Graphite smart font. This vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and resulting in high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in the KEV catalog. Community discussion and media coverage are minimal, with only one mention and one article found.

Impacted Technologies

VendorProductVersion(s)CPE
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
38.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
38.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
38.0.5CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.32%
Probability of exploitation in next 30 days
EPSS Percentile
81.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0232 is in the 91st percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (8)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:38.6.1-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:38.6.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:38.6.1-1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:38.6.0-1.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:38.6.1-1.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:38.6.0-1.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: graphite2-0:1.3.6-1.el7_2
View patch

Vendor Advisories (1)

redhatCVE-2016-1523Critical

graphite2: Heap-based buffer overflow in context item handling functionality

Feb 5, 2016

References

blog.talosintel.com / 2016/02/vulnerability-spotlight-libgraphite.html
lists.fedoraproject.org / pipermail/package-announce/2016-February/177520.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-May/184623.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-02/msg00053.html
lists.opensuse.org / opensuse-security-announce/2016-02/msg00055.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00052.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00058.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00088.html
rhn.redhat.com / errata/RHSA-2016-0197.html
rhn.redhat.com / errata/RHSA-2016-0258.html
rhn.redhat.com / errata/RHSA-2016-0594.html
bugzilla.mozilla.org / show_bug.cgi
Issue Tracking
security.gentoo.org / glsa/201605-06
security.gentoo.org / glsa/201701-35
security.gentoo.org / glsa/201701-63
debian.org / security/2016/dsa-3477
debian.org / security/2016/dsa-3479
Third Party Advisory
debian.org / security/2016/dsa-3491
mozilla.org / security/announce/2016/mfsa2016-14.html
PatchVendor Advisory
oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
securityfocus.com / bid/82991
securitytracker.com / id/1035017
ubuntu.com / usn/USN-2902-1
ubuntu.com / usn/USN-2904-1