Denial of Service via malformed HTTP/2 frames after session termination
Summary
Denial of Service via malformed HTTP/2 frames after session termination. Red Hat rates this important (CVSS 7.5). Weakness: CWE-617. Affected package(s): rhcos, nodejs:20, rhpam, rhaiis/vllm-cuda-rhel9:1778274666, nghttp2, rhui5/haproxy-rhel9:1776868744. Resolved in Red Hat advisory RHSA-2026:20040 — update the affected packages (`sudo dnf update`).
- rhcos-412.86.202605271418-0
- rhcos-414.92.202605060243-0
- nodejs:20-8100020260414073138.489197e6
- rhpam-7/rhpam-kieserver-rhel8:7.13.5-4.1777325709
- nodejs:20-9060020260422064119.rhel9
- rhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.1777325708
- rhaiis/vllm-cuda-rhel9:1778274666
- nghttp2-0:1.43.0-6.el9_6.1
- nghttp2-0:1.64.0-2.el10_1.1
- rhui5/haproxy-rhel9:1776868744
- rhui5/cds-rhel9:1776868774
- nghttp2
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- RHSA-2026:20040
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- 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 hours ago·verify at source
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