Bug 2527113 (CVE-2026-84639) - CVE-2026-84639 thunderbird: Uninitialized memory in MIME parsing
Summary: CVE-2026-84639 thunderbird: Uninitialized memory in MIME parsing
Keywords:
Status: NEW
Alias: CVE-2026-84639
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: 2026-09-01 21:41 UTC by OSIDB Bzimport
Modified: 2026-09-29 12:15 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-2026:70642 0 None None None 2026-09-24 01:58:10 UTC
Red Hat Product Errata RHSA-2026:73130 0 None None None 2026-09-29 12:15:31 UTC

Description OSIDB Bzimport 2026-09-01 21:41:53 UTC 
Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixed in Thunderbird 155.
Comment 1 Jon Orris 2026-09-24 01:58:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:70642 https://access.redhat.com/errata/RHSA-2026:70642
Comment 2 Jon Orris 2026-09-29 12:15:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:73130 https://access.redhat.com/errata/RHSA-2026:73130
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