Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature
Impact
A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.
Source excerpt · redhatWhat to do
Do not process or load untrusted web content with WebKitGTK.
In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp.
This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction.
To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface.
Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
WebKit · WebKit
Other versions: unaffected
| Version / range | Source status |
|---|---|
| 1.10.0 to before * | affected |
WebKitGTK · WebKitGTK
Other versions: unaffected
| Version / range | Source status |
|---|---|
| 1.10.0 to before * | affected |
Red Hat · Red Hat Enterprise Linux 8
Other versions: affected
| Version / range | Source status |
|---|---|
| 0:2.54.0-1.el8_10 to before * | unaffected |
Red Hat · Red Hat Enterprise Linux 9
Other versions: affected
| Version / range | Source status |
|---|---|
| 0:2.54.0-1.el9_8 to before * | unaffected |
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Other versions: affected
| Version / range | Source status |
|---|---|
| 0:2.54.0-1.el9_2 to before * | unaffected |
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support
Other versions: affected
| Version / range | Source status |
|---|---|
| 0:2.54.0-1.el9_6 to before * | unaffected |
Red Hat · Red Hat Enterprise Linux 6
Other versions: unknown
| Version / range | Source status |
|---|
Red Hat · Red Hat Enterprise Linux 7
Other versions: unaffected
| Version / range | Source status |
|---|
Red Hat · Red Hat Enterprise Linux 7
Other versions: affected
| Version / range | Source status |
|---|
Original source description
A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.
References
- Source reference access.redhat.com/errata/RHSA-2026:69098
- Source reference access.redhat.com/errata/RHSA-2026:74084
- Source reference access.redhat.com/errata/RHSA-2026:89821
- Source reference access.redhat.com/errata/RHSA-2026:89822
- Security advisory access.redhat.com/security/cve/CVE-2026-83596
- Source reference bugs.webkit.org/show_bug.cgi
- Source reference bugzilla.redhat.com/show_bug.cgi