Bug 2534187 (CVE-2026-92240) - CVE-2026-92240 thunderbird: Out-of-bounds read in IMAP response parser
Summary: CVE-2026-92240 thunderbird: Out-of-bounds read in IMAP response parser
Keywords:
Status: NEW
Alias: CVE-2026-92240
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 20:03 UTC by OSIDB Bzimport
Modified: 2026-10-13 08:49 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 01:58:13 UTC
Red Hat Product Errata RHSA-2026:73130 0 None None None 2026-09-29 12:16:11 UTC
Red Hat Product Errata RHSA-2026:73971 0 None None None 2026-09-30 14:20:02 UTC
Red Hat Product Errata RHSA-2026:81392 0 None None None 2026-10-12 17:29:59 UTC
Red Hat Product Errata RHSA-2026:81393 0 None None None 2026-10-12 17:39:04 UTC
Red Hat Product Errata RHSA-2026:81394 0 None None None 2026-10-12 17:37:22 UTC
Red Hat Product Errata RHSA-2026:81884 0 None None None 2026-10-13 04:55:28 UTC
Red Hat Product Errata RHSA-2026:81912 0 None None None 2026-10-13 05:00:29 UTC
Red Hat Product Errata RHSA-2026:81913 0 None None None 2026-10-13 04:59:12 UTC
Red Hat Product Errata RHSA-2026:82122 0 None None None 2026-10-13 08:49:14 UTC

Description OSIDB Bzimport 2026-09-15 20:03:13 UTC 
A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 140.16.
Comment 1 Jon Orris 2026-09-24 01:58:12 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 12:16:10 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
Comment 3 Jon Orris 2026-09-30 14:20:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:73971 https://access.redhat.com/errata/RHSA-2026:73971
Comment 4 Jon Orris 2026-10-12 17:29:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:81392 https://access.redhat.com/errata/RHSA-2026:81392
Comment 5 Jon Orris 2026-10-12 17:37:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:81394 https://access.redhat.com/errata/RHSA-2026:81394
Comment 6 Jon Orris 2026-10-12 17:39:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:81393 https://access.redhat.com/errata/RHSA-2026:81393
Comment 7 Jon Orris 2026-10-13 04:55:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:81884 https://access.redhat.com/errata/RHSA-2026:81884
Comment 8 Jon Orris 2026-10-13 04:59:11 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-2026:81913 https://access.redhat.com/errata/RHSA-2026:81913
Comment 9 Jon Orris 2026-10-13 05:00:28 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-2026:81912 https://access.redhat.com/errata/RHSA-2026:81912
Comment 10 Jon Orris 2026-10-13 08:49:13 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-2026:82122 https://access.redhat.com/errata/RHSA-2026:82122
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