The XRenderQueryFilters function in X.org libXrender before 0.9.10 allows remote X servers to trigger out-of-bounds write operations via ve…

published 2016-12-13 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8799

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.7%; EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits: 0; none known

The XRenderQueryFilters function in X.org libXrender before 0.9.10 allows remote X servers to trigger out-of-bounds write operations via vectors involving filter name lengths.

Patch / fix

distros 3 links 1

debian ubuntu suse

libxrender Debian 14, Debian 13, Debian 12 1:0.9.10-1

debian advisories DEBIAN-CVE-2016-7950

libxrender Ubuntu Pro 16.04 LTS 1:0.9.9-0ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2016-7950

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

xorg-x11-libXrender SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 7.4-1.20.1
libXi SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 1.7.4-14.1
libXv SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 1.0.10-7.1
libX11 SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 1.6.2-8.1
libXtst SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 1.2.2-7.1
libXvMC SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 1.0.8-7.1
libXfixes SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 5.0.1-7.1
libXrender SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +2 more 0.9.8-7.1

suse advisories SUSE-SU-2016:3115-1 SUSE-SU-2016:2828-1 SUSE-SU-2016:2505-1

cgit.freedesktop.org/xorg/lib/libXrender/commit/?id=8fad00b0b647ee662ce4737ca15… commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-7950 updated 2026-11-07 cvss 5.0

libXrender: Insufficient validation of server responses results out-of-bounds write in XRenderQueryFilters

Red Hat Enterprise Linux 5 libXrender Red Hat Enterprise Linux 6 libXrender Red Hat Enterprise Linux 7 libXrender
affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.72% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-787 Out-of-bounds Write

References

cgit.freedesktop.org /xorg/lib/libXrender/commit/?id=8fad00b0b647ee662ce4737ca15be033b7a21714
security.gentoo.org /glsa/201704-03
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/ZHUT5YOSWVMBJNWZGUQNZRBFIZKRM4A6/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/7WCKZFMZ76APAVMIRCUKKHEB4GAS7ZUP/
vendor-advisory
securitytracker.com /id/1036945
vdb-entry
lists.x.org /archives/xorg-announce/2016-October/002720.html
mailing-list
openwall.com /lists/oss-security/2016/10/04/4
mailing-list
securityfocus.com /bid/93369
vdb-entry
openwall.com /lists/oss-security/2016/10/04/2
mailing-list

Sources

CVE List CVE-2016-7950
NVD CVE-2016-7950

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary