Bug 2442333 (CVE-2026-2765) - CVE-2026-2765 firefox: thunderbird: Use-after-free in the JavaScript Engine component
Summary: CVE-2026-2765 firefox: thunderbird: Use-after-free in the JavaScript Engine c...
Keywords:
Status: NEW
Alias: CVE-2026-2765
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-24 14:05 UTC by OSIDB Bzimport
Modified: 2026-02-25 19:13 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-2026:3338 0 None None None 2026-02-25 11:32:47 UTC
Red Hat Product Errata RHSA-2026:3339 0 None None None 2026-02-25 11:42:50 UTC
Red Hat Product Errata RHSA-2026:3361 0 None None None 2026-02-25 15:20:46 UTC

Description OSIDB Bzimport 2026-02-24 14:05:48 UTC 
Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8.
Comment 1 errata-xmlrpc 2026-02-25 11:32:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:3338 https://access.redhat.com/errata/RHSA-2026:3338
Comment 2 errata-xmlrpc 2026-02-25 11:42:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:3339 https://access.redhat.com/errata/RHSA-2026:3339
Comment 3 errata-xmlrpc 2026-02-25 15:20:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:3361 https://access.redhat.com/errata/RHSA-2026:3361
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