Medium5.9Red Hat & Ubuntu Linux
Unbound DNS Cache Poisoning via Promiscuous Additional Section RRSet Acceptance
CVE-2026-42960 Published May 20, 2026
CVE-2026-42960
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Unbound DNS Cache Poisoning via Promiscuous Additional Section RRSet Acceptance. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-349. Affected package(s): unbound-main. Resolved in Red Hat advisory RHSA-2026:20357 — update the affected packages (`sudo dnf update`).
Affected versions
- unbound-main-1.25.1-1.hum1
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:20357
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:20357 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
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