Bug 2543150 (CVE-2026-100818) - CVE-2026-100818 firefox: thunderbird: Sandbox escape due to use-after-free in the Widget: Gtk component
Summary: CVE-2026-100818 firefox: thunderbird: Sandbox escape due to use-after-free in...
Keywords:
Status: NEW
Alias: CVE-2026-100818
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-29 13:05 UTC by OSIDB Bzimport
Modified: 2026-10-12 10:28 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-2026:76761 0 None None None 2026-10-08 06:35:22 UTC
Red Hat Product Errata RHSA-2026:76764 0 None None None 2026-10-06 20:18:58 UTC
Red Hat Product Errata RHSA-2026:76850 0 None None None 2026-10-06 19:18:57 UTC
Red Hat Product Errata RHSA-2026:80674 0 None None None 2026-10-12 09:21:06 UTC
Red Hat Product Errata RHSA-2026:80694 0 None None None 2026-10-12 10:28:50 UTC

Description OSIDB Bzimport 2026-09-29 13:05:28 UTC 
Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Comment 1 Jon Orris 2026-10-06 19:18:56 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 19:18:56 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 20:18:57 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
Comment 4 Jon Orris 2026-10-06 20:18:58 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
Comment 5 Jon Orris 2026-10-08 06:35:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:76761 https://access.redhat.com/errata/RHSA-2026:76761
Comment 6 Jon Orris 2026-10-12 09:21:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:80674 https://access.redhat.com/errata/RHSA-2026:80674
Comment 7 Jon Orris 2026-10-12 10:28:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:80694 https://access.redhat.com/errata/RHSA-2026:80694
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