CVE-2018-12294: WebCore/platform/graphics/texmap/TextureMapperLayer.cpp in WebKit, as used in WebKitGTK+ prior to version 2.20

Q: How do I fix CVE-2018-12294?

webkitgtk\+: upgrade to 2.20.2. Exact commands for each OS are on this page.

Q: Is CVE-2018-12294 being exploited?

CVE-2018-12294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-12294 affect?

CVE-2018-12294 affects webkitgtk\+. Severity is high (CVSS 8.8). 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.

This month

HIGH 8.8UPGRADE

CVE-2018-12294 is a high-severity flaw (CVSS 8.8) affecting webkitgtk\+. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.3% (top 16%)
CISA exploited list	No
Weakness	CWE-416
Published	2018-06-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: webkit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-06-19 21:29 UTCPublished CVE record published
2026-06-17 01:37 UTCUpdated Record last modified

webkit webkitgtk\+ UPGRADE

Affected: < 2.20.2

Fixed in: 2.20.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy webkitgtk+ || rpm -q webkitgtk+ || webkitgtk+ --version

2. UPGRADE to 2.20.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade webkitgtk+

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade webkitgtk+

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-12294?

webkitgtk\+: upgrade to 2.20.2. Exact commands for each OS are on this page.

Is CVE-2018-12294 being exploited?

CVE-2018-12294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-12294 affect?

CVE-2018-12294 affects webkitgtk\+. Severity is high (CVSS 8.8). 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.

How urgent is CVE-2018-12294?

Priority 52/100. High severity

Software pages

WebKit vulnerabilities · Apple Safari and WebKit vulnerabilities

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References

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