Expired Pointer Dereference Affecting thunderbird package, versions <0:140.12.0-1.el9_6


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (15th percentile)

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  • Snyk IDSNYK-RHEL9-THUNDERBIRD-17957553
  • published13 Jul 2026
  • disclosed16 Jun 2026

Introduced: 16 Jun 2026

CVE-2026-12309  (opens in a new tab)
CWE-825  (opens in a new tab)

How to fix?

Upgrade RHEL:9 thunderbird to version 0:140.12.0-1.el9_6 or higher.
This issue was patched in RHSA-2026:38750.

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.

Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVSS Base Scores

version 3.1