High7.6Vendor: MediumRed Hat Linux

High [CVE-2026-4430] Denial of Service via crafted OOXML documents

This high-severity Red Hat Linux advisory covers CVE-2026-4430 affecting Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8, libreoffice.

CVE-2026-4430 Published May 7, 2026

CVE-2026-4430

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Denial of Service via crafted OOXML documents. Red Hat rates this moderate (CVSS 7.6).

Weakness: CWE-787. Affected package(s): libreoffice.

Resolved in Red Hat advisory RHSA-2026:28922 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.

Affected versions

libreoffice-1:7.1.8.1-15.el9_8.1
libreoffice-1:6.4.7.2-20.el8_10

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

Fixed versions

RHSA-2026:28922

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-2026:28922 (`sudo dnf update` / `yum update`).

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

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