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CVE-2016-7947

33
FAUCET Score

CVE-2016-7947 describes multiple integer overflows in X.org libXrandr versions prior to 1.5.1, allowing remote X servers to trigger out-of-bounds write operations via a crafted response, affecting Fedora and X.org libXrandr. This vulnerability is rated Critical (CVSS 9.8), indicating it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, suggesting awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
24CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
25CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
<= 1.5.0CPE matchmatch criteria
cpe:2.3:a:x.org:libxrandr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.63%
Probability of exploitation in next 30 days
EPSS Percentile
88.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0363 is in the 81st percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

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

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libXrandr
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXrandr
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libXrandr

Vendor Advisories (1)

redhatCVE-2016-7947Moderate

libXrandr: Insufficient validation of server responses result in Integer overflows

Sep 25, 2016

References

cgit.freedesktop.org / xorg/lib/libXrandr/commit
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/74FFOHWYIKQZTJLRJWDMJ4W3WYBELUUG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Y7662OZWCSTLRPKS6R3E4Y4M26BSVAAM
lists.x.org / archives/xorg-announce/2016-October/002720.html
security.gentoo.org / glsa/201704-03
openwall.com / lists/oss-security/2016/10/04/2
openwall.com / lists/oss-security/2016/10/04/4
securityfocus.com / bid/93365
securitytracker.com / id/1036945