CVE-2017-1000121

critical

Published 2017-11-01 · Modified 2026-05-13

CVSS v3

9.8

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

CVSS v2

7.5

VIR risk

9.8

Description

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2017-1000121

vendor Authored 2026-05-27

Vendor advisory: nvd@nist.gov — https://webkitgtk.org/security/WSA-2017-0007.html

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://trac.webkit.org/changeset/217126/webkit

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`2.16.3-2`
debian	bullseye	fixed	`2.16.3-2`
debian	forky	fixed	`2.16.3-2`
debian	sid	fixed	`2.16.3-2`
debian	trixie	fixed	`2.16.3-2`

Application impact

Vendor	Product	Versions	Fixed
webkitgtk	webkitgtk\+	`{"endExcluding":"2.16.3"}`	`2.16.3`

References

CWEs

CWE-190

Verify integrity in audit chain (admin only). AS-IS.