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CVE-2016-5384

28
FAUCET Score

CVE-2016-5384 describes a critical vulnerability in fontconfig versions prior to 2.12.1, affecting various Linux distributions including Canonical, Debian, and Fedora. This flaw allows a local attacker to trigger arbitrary free calls through a specially crafted cache file, leading to double free attacks and potential arbitrary code execution. With a CVSS v3.1 score of 7.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the underlying weakness (CWE-415) remains a concern.

Impacted Technologies

VendorProductVersion(s)CPE
23CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
24CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
< 2.12.1CPE matchmatch criteria
cpe:2.3:a:fontconfig_project:fontconfig:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 73rd percentile among its peer group of 16,985 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

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: fontconfig-0:2.10.95-10.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: fontconfig
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: fontconfig
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Virtualization 3Fixed in: mingw-virt-viewer

Vendor Advisories (1)

redhatCVE-2016-5384Moderate

fontconfig: Possible double free due to insufficiently validated cache files

Aug 5, 2016

References

rhn.redhat.com / errata/RHSA-2016-2601.html
Third Party Advisory
cgit.freedesktop.org / fontconfig/commit
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6CJ45VRAMCIISHOVKFVOQYQUSTUJP7FC
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/GGOS4YYB7UYAWX5AEXJZHDIX4ZMSXSW5
lists.freedesktop.org / archives/fontconfig/2016-August/005792.html
Mailing ListPatchThird Party Advisory
debian.org / security/2016/dsa-3644
Third Party Advisory
securityfocus.com / bid/92339
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3063-1
Third Party Advisory