Bug 1986863 (CVE-2021-21775) - CVE-2021-21775 webkitgtk: Use-after-free in ImageLoader dispatchPendingErrorEvent leading to information leak and possibly code execution
Summary: CVE-2021-21775 webkitgtk: Use-after-free in ImageLoader dispatchPendingErrorE...
Alias: CVE-2021-21775
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1999828
Blocks: 1986910
TreeView+ depends on / blocked
Reported: 2021-07-28 13:33 UTC by Michael Kaplan
Modified: 2021-11-10 00:52 UTC (History)
4 users (show)

Fixed In Version: webkitgtk 2.32.3
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-11-10 00:52:24 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4381 0 None None None 2021-11-09 18:31:34 UTC

Description Michael Kaplan 2021-07-28 13:33:02 UTC
A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of WebKit. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage.

Comment 1 Tomas Hoger 2021-08-30 14:47:08 UTC
Upstream advisory:


Comment 2 Tomas Hoger 2021-08-31 15:13:27 UTC
Talos advisory with more details:


Comment 4 errata-xmlrpc 2021-11-09 18:31:33 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4381 https://access.redhat.com/errata/RHSA-2021:4381

Comment 5 Product Security DevOps Team 2021-11-10 00:52:23 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


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