Bug 2460088 (CVE-2026-6786)

Summary:	CVE-2026-6786 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	gotiwari, jgrulich, jhorak, mvyas, rhel-process-autobot, tpopela, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. 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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-04-21 14:02:12 UTC

Memory safety bugs present in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. 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 150 and Firefox ESR 140.10.

Comment 1 errata-xmlrpc 2026-04-27 10:44:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:10757 https://access.redhat.com/errata/RHSA-2026:10757

Comment 2 errata-xmlrpc 2026-04-27 12:16:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:10767 https://access.redhat.com/errata/RHSA-2026:10767

Comment 3 errata-xmlrpc 2026-04-27 12:28:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:10766 https://access.redhat.com/errata/RHSA-2026:10766

Comment 4 errata-xmlrpc 2026-04-30 13:50:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:12285 https://access.redhat.com/errata/RHSA-2026:12285

Comment 5 errata-xmlrpc 2026-05-04 16:48:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:13537 https://access.redhat.com/errata/RHSA-2026:13537

Comment 6 errata-xmlrpc 2026-05-11 02:04:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:15892 https://access.redhat.com/errata/RHSA-2026:15892

Comment 7 errata-xmlrpc 2026-05-14 08:24:29 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-2026:17477 https://access.redhat.com/errata/RHSA-2026:17477

Comment 8 errata-xmlrpc 2026-05-14 19:43:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:17690 https://access.redhat.com/errata/RHSA-2026:17690

Comment 9 errata-xmlrpc 2026-05-14 19:48:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:17687 https://access.redhat.com/errata/RHSA-2026:17687

Comment 10 errata-xmlrpc 2026-05-14 19:53:20 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:17689 https://access.redhat.com/errata/RHSA-2026:17689

Comment 11 errata-xmlrpc 2026-05-14 20:14:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:17688 https://access.redhat.com/errata/RHSA-2026:17688

Comment 12 errata-xmlrpc 2026-05-19 13:06:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19041 https://access.redhat.com/errata/RHSA-2026:19041

Comment 13 errata-xmlrpc 2026-05-19 16:05:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19131 https://access.redhat.com/errata/RHSA-2026:19131

Comment 14 errata-xmlrpc 2026-05-19 18:01:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19201 https://access.redhat.com/errata/RHSA-2026:19201

Comment 15 errata-xmlrpc 2026-05-19 21:37:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19348 https://access.redhat.com/errata/RHSA-2026:19348

Comment 16 errata-xmlrpc 2026-05-20 02:00:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:19461 https://access.redhat.com/errata/RHSA-2026:19461

Comment 17 errata-xmlrpc 2026-05-20 02:08:32 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-2026:19465 https://access.redhat.com/errata/RHSA-2026:19465

Comment 18 errata-xmlrpc 2026-05-20 02:19:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:19463 https://access.redhat.com/errata/RHSA-2026:19463

Comment 19 errata-xmlrpc 2026-05-20 02:51:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:19468 https://access.redhat.com/errata/RHSA-2026:19468

Comment 20 errata-xmlrpc 2026-05-20 02:53:07 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-2026:19467 https://access.redhat.com/errata/RHSA-2026:19467

Comment 21 errata-xmlrpc 2026-05-20 02:59:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:19469 https://access.redhat.com/errata/RHSA-2026:19469

Comment 22 errata-xmlrpc 2026-05-20 03:01:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:19464 https://access.redhat.com/errata/RHSA-2026:19464

Comment 23 errata-xmlrpc 2026-05-20 03:03:34 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:19466 https://access.redhat.com/errata/RHSA-2026:19466

Comment 24 errata-xmlrpc 2026-05-20 03:05:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:19462 https://access.redhat.com/errata/RHSA-2026:19462

Comment 25 errata-xmlrpc 2026-05-20 07:32:25 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:19542 https://access.redhat.com/errata/RHSA-2026:19542

Comment 26 errata-xmlrpc 2026-05-20 13:02:52 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-2026:19655 https://access.redhat.com/errata/RHSA-2026:19655

Comment 27 errata-xmlrpc 2026-05-20 14:17:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:19704 https://access.redhat.com/errata/RHSA-2026:19704