Access of Resource Using Incompatible Type ('Type Confusion') Affecting thunderbird package, versions <0:140.16.0-1.el9_8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.54% (43rd percentile)

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  • Snyk IDSNYK-RHEL9-THUNDERBIRD-20082633
  • published24 Sept 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

NewCVE-2026-92238  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

Upgrade RHEL:9 thunderbird to version 0:140.16.0-1.el9_8 or higher.
This issue was patched in RHSA-2026:70642.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

CVSS Base Scores

version 3.1