Bug 2428967 (CVE-2026-0884) - CVE-2026-0884 firefox: thunderbird: Use-after-free in the JavaScript Engine component
Summary: CVE-2026-0884 firefox: thunderbird: Use-after-free in the JavaScript Engine c...
Keywords:
Status: NEW
Alias: CVE-2026-0884
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: 2026-01-13 14:02 UTC by OSIDB Bzimport
Modified: 2026-01-21 11:56 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-2026:0667 0 None None None 2026-01-15 08:19:19 UTC
Red Hat Product Errata RHSA-2026:0694 0 None None None 2026-01-15 11:47:29 UTC
Red Hat Product Errata RHSA-2026:0924 0 None None None 2026-01-21 11:56:52 UTC

Description OSIDB Bzimport 2026-01-13 14:02:18 UTC 
Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Comment 1 errata-xmlrpc 2026-01-15 08:19:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:0667 https://access.redhat.com/errata/RHSA-2026:0667
Comment 2 errata-xmlrpc 2026-01-15 11:47:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:0694 https://access.redhat.com/errata/RHSA-2026:0694
Comment 3 errata-xmlrpc 2026-01-21 11:56:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:0924 https://access.redhat.com/errata/RHSA-2026:0924
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