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High7.5Vendor: MediumRed Hat Linux

High [CVE-2026-5121] Arbitrary code execution via integer overflow in ISO9660 image processing

This high-severity Red Hat Linux advisory covers CVE-2026-5121 affecting Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

CVE-2026-5121 Published Mar 30, 2026
CVE-2026-5121
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Arbitrary code execution via integer overflow in ISO9660 image processing. Red Hat rates this moderate (CVSS 7.5).

Weakness: CWE-190. Affected package(s): libarchive, rhcos, rhpam, rhaiis/vllm-rocm-rhel9:1778244531, rhaiis/vllm-cuda-rhel9:1778274666, rhui5/cds-kubernetes-tp-rhel9:1777459441.

Resolved in Red Hat advisory RHSA-2026:20040 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.2 Advanced Update 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 24 more.

Affected versions
  • libarchive-0:3.5.3-9.el9_7
  • rhcos-414.92.202605060243-0
  • rhpam-7/rhpam-controller-rhel8:7.13.5-4.1777325710
  • rhcos-417.94.202605112123-0
  • rhcos-418.94.202604240015-0
  • rhpam-7/rhpam-kieserver-rhel8:7.13.5-4.1777325709
  • rhaiis/vllm-rocm-rhel9:1778244531
  • libarchive-0:3.3.3-5.el8_8.2
  • rhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.1777325708
  • rhaiis/vllm-cuda-rhel9:1778274666
  • rhui5/cds-kubernetes-tp-rhel9:1777459441
  • rhpam-7/rhpam-businesscentral-monitoring-rhel8:7.13.5-4.1777325677

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

Fixed versions
  • RHSA-2026:20040

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-2026:20040 (`sudo dnf update` / `yum update`).

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

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