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High7.5Red Hat Linux

High [CVE-2026-7323] Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1

This high-severity Red Hat Linux advisory covers CVE-2026-7323 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

CVE-2026-7323 Published Apr 28, 2026
CVE-2026-7323
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1. Red Hat rates this important (CVSS 7.5).

Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:19370 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 8 more.

Affected versions
  • firefox-0:140.10.1-1.el9_4
  • thunderbird-0:140.10.1-1.el9_6
  • firefox-0:140.10.1-1.el8_4
  • thunderbird-0:140.10.1-1.el8_6
  • thunderbird-0:140.10.1-1.el9_4
  • firefox-0:140.10.1-1.el9_6
  • firefox-0:140.10.1-1.el10_2
  • thunderbird-0:140.10.1-1.el8_4
  • firefox-0:140.10.1-1.el8_6
  • firefox-0:140.10.1-1.el9_0
  • thunderbird-0:140.10.1-1.el9_8
  • firefox-0:140.10.1-1.el9_2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:19370

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:19370 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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