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


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.38% (30th percentile)

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  • Snyk IDSNYK-RHEL9-FIREFOX-17878112
  • published7 Jul 2026
  • disclosed16 Jun 2026

Introduced: 16 Jun 2026

CVE-2026-12291  (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.

Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

CVSS Base Scores

version 3.1