CVE-2017-1000121

9.8 criticalEPSS 1.2%

Critical (9.8) in webkitgtk webkitgtk\+. EPSS 1.2% chance of exploitation in the next 30 days.

The UNIX IPC layer in WebKit, including WebKitGTK+ prior to 2.16.3, does not properly validate message size metadata, allowing a compromised secondary process to trigger an integer overflow and subsequent buffer overflow in the UI process. This vulnerability does not affect Apple products.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2017-11-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

webkitgtk:webkitgtk\+

References

http://trac.webkit.org/changeset/217126/webkit
https://webkitgtk.org/security/WSA-2017-0007.html
http://trac.webkit.org/changeset/217126/webkit

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