Expired Pointer Dereference Affecting thunderbird-debugsource package, versions <0:140.15.0-1.el10_0


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.27% (17th percentile)

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  • Snyk IDSNYK-RHEL10-THUNDERBIRDDEBUGSOURCE-20656669
  • published9 Oct 2026
  • disclosed1 Sept 2026

Introduced: 1 Sep 2026

CVE-2026-84641  (opens in a new tab)
CWE-825  (opens in a new tab)

How to fix?

Upgrade RHEL:10 thunderbird-debugsource to version 0:140.15.0-1.el10_0 or higher.
This issue was patched in RHSA-2026:77631.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird-debugsource package and not the thunderbird-debugsource package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

CVSS Base Scores

version 3.1