Bug 2543166 (CVE-2026-100789) - CVE-2026-100789 firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component
Summary: CVE-2026-100789 firefox: thunderbird: Use-after-free in the Graphics: Canvas2...
Keywords:
Status: NEW
Alias: CVE-2026-100789
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-29 13:10 UTC by OSIDB Bzimport
Modified: 2026-10-06 20:19 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:76764 0 None None None 2026-10-06 20:19:11 UTC
Red Hat Product Errata RHSA-2026:76850 0 None None None 2026-10-06 19:18:55 UTC

Description OSIDB Bzimport 2026-09-29 13:10:08 UTC 
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Comment 1 Jon Orris 2026-10-06 19:18:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76850 https://access.redhat.com/errata/RHSA-2026:76850
Comment 2 Jon Orris 2026-10-06 19:18:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76850 https://access.redhat.com/errata/RHSA-2026:76850
Comment 3 Jon Orris 2026-10-06 20:19:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:76764 https://access.redhat.com/errata/RHSA-2026:76764
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