CVE-2018-12294

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-19 · updated 2026-06-17
Weakness: CWE-416

Description

WebCore/platform/graphics/texmap/TextureMapperLayer.cpp in WebKit, as used in WebKitGTK+ prior to version 2.20.2, is vulnerable to a use after free for a WebCore::TextureMapperLayer object.

Affected products

Webkitgtk+: before 2.20.2 — fixed in 2.20.2

How to fix

Upgrade to a fixed version: Webkitgtk+ 2.20.2. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/148200/WebKitGTK-Data-Leak-Code-Execution.html
http://www.openwall.com/lists/oss-security/2018/06/14/1
http://www.securityfocus.com/archive/1/542087/100/0/threaded
https://bugs.webkit.org/show_bug.cgi?id=184729
https://security.gentoo.org/glsa/201808-04
https://trac.webkit.org/changeset/231300/webkit
http://packetstormsecurity.com/files/148200/WebKitGTK-Data-Leak-Code-Execution.html
http://www.openwall.com/lists/oss-security/2018/06/14/1
http://www.securityfocus.com/archive/1/542087/100/0/threaded
https://bugs.webkit.org/show_bug.cgi?id=184729
https://security.gentoo.org/glsa/201808-04
https://trac.webkit.org/changeset/231300/webkit

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