WebKitGTK+ before 2.14.0: A use-after-free vulnerability can allow remote attackers to cause a DoS

published 2020-01-22 6 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5746

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits: 0; none known

Patch / fix

fixed in 1 distros 1

webkitgtk webkitgtk+ 2.14.0

webkit2gtk Ubuntu 16.04 LTS 2.14.2-0ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2016-4761

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

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-2016-4761 updated 2026-11-07 cvss 8.8

webkitgtk: use-after-free leads to DoS

Red Hat Enterprise Linux 6 webkitgtk
affected: no fix planned “Out of support scope”
Red Hat Enterprise Linux 7 webkitgtk3, webkitgtk4, libwebkit2gtk, webkitgtk4-jsc, webkitgtk4-plugin-process-gtk2 Red Hat Enterprise Linux 8 webkit2gtk3, webkit2gtk3-jsc, webkit2gtk3-plugin-process-gtk2
not affected: vulnerable code not present

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

1.39% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

WebKitGTK+ WebKitGTK+

Classification

Weakness

CWE-416 Use After Free

References

openwall.com /lists/oss-security/2016/11/04/14
mailing-list, third-party-advisory
ubuntu.com /usn/USN-3166-1
third-party-advisory

Sources

CVE List CVE-2016-4761
NVD CVE-2016-4761

Fencer Vulns 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