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CVE-2016-7953

25
FAUCET Score

CVE-2016-7953 describes a critical buffer underflow vulnerability in X.org libXvMC versions prior to 1.0.10, affecting Fedora and X.org products. This flaw allows remote X servers to cause unspecified impact by sending an empty string. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network without user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

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:*:*:*:*:*:*:*
<= 1.0.9CPE matchmatch criteria
cpe:2.3:a:x.org:libxvmc:*:*:*:*:*:*:*:*

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
3.32%
Probability of exploitation in next 30 days
EPSS Percentile
87.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0332 is in the 79th percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Vendor Advisories (1)

redhatCVE-2016-7953Moderate

libXvMC: Insufficient validation of server responses results in buffer underflow

Sep 25, 2016

References

cgit.freedesktop.org / xorg/lib/libXvMC/commit
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/DLZ3CBE3LKTSHIQYM6RKZYJ5PJ5IGTYG
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/M4SI52ZOHOK6524DI2TOW4DX6HPKNFNB
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/93371
securitytracker.com / id/1036945