Bug 1986877 (CVE-2021-30666) - CVE-2021-30666 webkitgtk: Buffer overflow leading to arbitrary code execution
Summary: CVE-2021-30666 webkitgtk: Buffer overflow leading to arbitrary code execution
Alias: CVE-2021-30666
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1877119 1877358 1986878 2079457 2079458 2079459
Blocks: 1986910
TreeView+ depends on / blocked
Reported: 2021-07-28 13:38 UTC by Michael Kaplan
Modified: 2023-03-16 14:05 UTC (History)
6 users (show)

Fixed In Version: webkitgtk 2.26.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the webkitgtk package. Affected versions of this package are vulnerable to a buffer overflow caused by improper bounds checking by the WebKit component. By persuading a victim to visit a specially crafted Web site, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
Clone Of:
Last Closed: 2021-08-30 23:57:22 UTC

Attachments (Terms of Use)

Description Michael Kaplan 2021-07-28 13:38:21 UTC
A buffer overflow issue was addressed with improved memory handling.

Comment 1 Michael Kaplan 2021-07-28 13:39:09 UTC
Created webkit2gtk3 tracking bugs for this issue:

Affects: fedora-all [bug 1986878]

Comment 2 Tomas Hoger 2021-08-30 14:47:46 UTC
Upstream advisory:


Comment 3 Tomas Hoger 2021-08-30 19:59:55 UTC
According to WebKitGTK upstream advisory, this issue was fixed upstream in version 2.26.0.  The webkitgtk4 packages in Red Hat Enterprise Linux 6 and webkit2gtk3 packages in Red Hat Enterprise Linux 8 were previously updated to fixed upstream versions via the following errata:


Comment 4 Product Security DevOps Team 2021-08-30 23:57:22 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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