CVE-2026-83596

Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature

State: Published
Severity: 8.8 High
Published: Aug 31, 2026
Updated: Nov 2, 2026
Reserved: Aug 31, 2026

Description

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input

Affected Products

Product	Versions
WebKitWebKit	1.10.0 and laterAffected
WebKitGTKWebKitGTK	1.10.0 and laterAffected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat	0:2.54.0-1.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:2.54.0-1.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:2.54.0-1.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:2.54.0-1.el8_6 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:2.54.0-1.el8_8 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:2.54.0-1.el8_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:2.54.0-1.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:2.54.0-1.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:2.54.0-1.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:2.54.0-1.el9_6 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat

References

RHSA-2026:69098vendor-advisory
RHSA-2026:74084vendor-advisory
RHSA-2026:89821vendor-advisory
RHSA-2026:89822vendor-advisory
RHSA-2026:91631vendor-advisory
RHSA-2026:92216vendor-advisory
RHSA-2026:92339vendor-advisory
RHSA-2026:93435vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-83596vdb-entry
https://bugs.webkit.org/show_bug.cgi?id=322969
RHBZ#2526490issue-tracking

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