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CVE-2016-7946

20
FAUCET Score

CVE-2016-7946 describes a denial-of-service vulnerability in X.org's libXi library, specifically versions prior to 1.7.7, affecting products like Fedora and X.org's libXi. This high-severity flaw (CVSS 7.5) can be triggered remotely by malicious X servers manipulating length fields, leading to an infinite loop and system unavailability. While no public exploit code or active exploitation is reported, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.7.6CPE matchmatch criteria
cpe:2.3:a:x.org:libxi:*:*:*:*:*:*:*:*
24CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
25CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.01%
Probability of exploitation in next 30 days
EPSS Percentile
86.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0301 is in the 75th percentile among its peer group of 51,485 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

Vendor Patches (3)

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

Vendor Advisories (1)

redhatCVE-2016-7946Low

libXi: Insufficient validation of server responses result in various data mishandlings

Sep 25, 2016

References

cgit.freedesktop.org / xorg/lib/libXi/commit
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/C3NTWIWSQ575GREBVAOUQUIMDL5CDVGP
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/KVTZ2XLPKLASQUIQA2GMKKAUOQIUMM7I
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/93374
securitytracker.com / id/1036945