High7.4Red Hat & Ubuntu Linux
Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation
CVE-2026-3593 Published May 21, 2026
CVE-2026-3593
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation. Red Hat rates this important (CVSS 7.4). Weakness: CWE-825. Affected package(s): bind-main. Resolved in Red Hat advisory RHSA-2026:7412 — update the affected packages (`sudo dnf update`).
Affected versions
- bind-main-9.18.48-1.1.hum1
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:7412
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-2026:7412 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
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