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Medium5.3Red Hat Linux

Medium [CVE-2026-28421] Denial of service and information disclosure via crafted swap file

This medium-severity Red Hat Linux advisory covers CVE-2026-28421 affecting Red Hat Enterprise Linux 1, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8.

CVE-2026-28421 Published Feb 27, 2026
CVE-2026-28421
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Denial of service and information disclosure via crafted swap file. Red Hat rates this moderate (CVSS 5.3).

Weakness: CWE-120. Affected package(s): rhcos, rhaiis/vllm-rocm-rhel9:1778244531, rhui5/cds-kubernetes-tp-rhel9:1777459441, rhui5/haproxy-rhel9:1776868744, rhui5/installer-rhel9:1776868772, vim.

Resolved in Red Hat advisory RHSA-2026:6915 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 7.

Affected versions
  • rhcos-414.92.202605060243-0
  • rhcos-417.94.202605112123-0
  • rhaiis/vllm-rocm-rhel9:1778244531
  • rhcos-4.19.9.6.202604080618-0
  • rhui5/cds-kubernetes-tp-rhel9:1777459441
  • rhui5/haproxy-rhel9:1776868744
  • rhui5/installer-rhel9:1776868772
  • vim-2:9.1.083-5.el10_0.2
  • rhui5/cds-rhel9:1776868774
  • vim-2:8.2.2637-23.el9_7.2
  • rhaiis/vllm-cuda-rhel9:1775740563
  • vim-2:8.0.1763-20.el8_8.1

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

Fixed versions
  • RHSA-2026:6915

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-2026:6915 (`sudo dnf update` / `yum update`).

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

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