Out-of-bounds Write Affecting firefox package, versions <0:140.11.0-1.el9_8


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.24% (16th percentile)

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  • Snyk IDSNYK-RHEL9-FIREFOX-16776532
  • published21 May 2026
  • disclosed12 May 2026

Introduced: 12 May 2026

CVE-2026-8388  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade RHEL:9 firefox to version 0:140.11.0-1.el9_8 or higher.
This issue was patched in RHSA-2026:21378.

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.

Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

CVSS Base Scores

version 3.1