Bug 2489211 (CVE-2026-12327) - CVE-2026-12327 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
Summary: CVE-2026-12327 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR ...
Keywords:
Status: NEW
Alias: CVE-2026-12327
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-16 14:01 UTC by OSIDB Bzimport
Modified: 2026-07-15 05:19 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-2026:27717 0 None None None 2026-06-22 03:03:22 UTC
Red Hat Product Errata RHSA-2026:27733 0 None None None 2026-06-22 03:51:02 UTC
Red Hat Product Errata RHSA-2026:27734 0 None None None 2026-06-22 04:18:38 UTC
Red Hat Product Errata RHSA-2026:29940 0 None None None 2026-06-25 15:58:49 UTC
Red Hat Product Errata RHSA-2026:30846 0 None None None 2026-06-29 18:16:32 UTC
Red Hat Product Errata RHSA-2026:33445 0 None None None 2026-06-30 10:21:32 UTC
Red Hat Product Errata RHSA-2026:36100 0 None None None 2026-07-07 06:27:14 UTC
Red Hat Product Errata RHSA-2026:36101 0 None None None 2026-07-07 06:37:30 UTC
Red Hat Product Errata RHSA-2026:36102 0 None None None 2026-07-07 06:29:57 UTC
Red Hat Product Errata RHSA-2026:36103 0 None None None 2026-07-07 06:33:32 UTC
Red Hat Product Errata RHSA-2026:37210 0 None None None 2026-07-09 09:21:33 UTC
Red Hat Product Errata RHSA-2026:37391 0 None None None 2026-07-09 16:56:12 UTC
Red Hat Product Errata RHSA-2026:38506 0 None None None 2026-07-13 03:33:06 UTC
Red Hat Product Errata RHSA-2026:38750 0 None None None 2026-07-13 08:16:37 UTC
Red Hat Product Errata RHSA-2026:38751 0 None None None 2026-07-13 07:48:08 UTC
Red Hat Product Errata RHSA-2026:38753 0 None None None 2026-07-13 08:09:22 UTC
Red Hat Product Errata RHSA-2026:39011 0 None None None 2026-07-13 16:53:50 UTC
Red Hat Product Errata RHSA-2026:39141 0 None None None 2026-07-14 08:56:51 UTC
Red Hat Product Errata RHSA-2026:39142 0 None None None 2026-07-14 09:07:45 UTC
Red Hat Product Errata RHSA-2026:39428 0 None None None 2026-07-14 19:15:03 UTC
Red Hat Product Errata RHSA-2026:39706 0 None None None 2026-07-15 05:19:35 UTC

Description OSIDB Bzimport 2026-06-16 14:01:33 UTC 
Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
Comment 1 errata-xmlrpc 2026-06-22 03:03:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:27717 https://access.redhat.com/errata/RHSA-2026:27717
Comment 2 errata-xmlrpc 2026-06-22 03:51:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:27733 https://access.redhat.com/errata/RHSA-2026:27733
Comment 3 errata-xmlrpc 2026-06-22 04:18:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:27734 https://access.redhat.com/errata/RHSA-2026:27734
Comment 4 errata-xmlrpc 2026-06-25 15:58:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:29940 https://access.redhat.com/errata/RHSA-2026:29940
Comment 5 errata-xmlrpc 2026-06-29 18:16:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:30846 https://access.redhat.com/errata/RHSA-2026:30846
Comment 6 errata-xmlrpc 2026-06-30 10:21:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:33445 https://access.redhat.com/errata/RHSA-2026:33445
Comment 7 errata-xmlrpc 2026-07-07 06:27:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:36100 https://access.redhat.com/errata/RHSA-2026:36100
Comment 8 errata-xmlrpc 2026-07-07 06:29:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:36102 https://access.redhat.com/errata/RHSA-2026:36102
Comment 9 errata-xmlrpc 2026-07-07 06:33:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:36103 https://access.redhat.com/errata/RHSA-2026:36103
Comment 10 errata-xmlrpc 2026-07-07 06:37:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:36101 https://access.redhat.com/errata/RHSA-2026:36101
Comment 11 errata-xmlrpc 2026-07-09 09:21:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:37210 https://access.redhat.com/errata/RHSA-2026:37210
Comment 12 errata-xmlrpc 2026-07-09 16:56:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:37391 https://access.redhat.com/errata/RHSA-2026:37391
Comment 13 errata-xmlrpc 2026-07-13 03:33:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:38506 https://access.redhat.com/errata/RHSA-2026:38506
Comment 14 errata-xmlrpc 2026-07-13 07:48:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:38751 https://access.redhat.com/errata/RHSA-2026:38751
Comment 15 errata-xmlrpc 2026-07-13 08:09:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:38753 https://access.redhat.com/errata/RHSA-2026:38753
Comment 16 errata-xmlrpc 2026-07-13 08:16:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:38750 https://access.redhat.com/errata/RHSA-2026:38750
Comment 17 errata-xmlrpc 2026-07-13 16:53:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:39011 https://access.redhat.com/errata/RHSA-2026:39011
Comment 18 errata-xmlrpc 2026-07-14 08:56:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:39141 https://access.redhat.com/errata/RHSA-2026:39141
Comment 19 errata-xmlrpc 2026-07-14 09:07:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:39142 https://access.redhat.com/errata/RHSA-2026:39142
Comment 20 errata-xmlrpc 2026-07-14 19:15:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:39428 https://access.redhat.com/errata/RHSA-2026:39428
Comment 21 errata-xmlrpc 2026-07-15 05:19:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:39706 https://access.redhat.com/errata/RHSA-2026:39706
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