Expired Pointer Dereference Affecting firefox package, versions <0:140.12.0-1.el9_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.26% (18th percentile)

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  • Snyk IDSNYK-RHEL9-FIREFOX-17878124
  • published7 Jul 2026
  • disclosed16 Jun 2026

Introduced: 16 Jun 2026

CVE-2026-12307  (opens in a new tab)
CWE-825  (opens in a new tab)

How to fix?

Upgrade RHEL:9 firefox to version 0:140.12.0-1.el9_2 or higher.
This issue was patched in RHSA-2026:36101.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox 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