Medium6.5Red Hat & Ubuntu Linux
Application crash or uninitialized memory read via crafted DNS response
CVE-2026-6238 Published Apr 28, 2026
CVE-2026-6238
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Application crash or uninitialized memory read via crafted DNS response. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-1284. Affected package(s): glibc-main. Resolved in Red Hat advisory RHSA-2026:12740 — update the affected packages (`sudo dnf update`).
Affected versions
- glibc-main-2.42-12.hum1
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
Fixed versions
- RHSA-2026:12740
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-2026:12740 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 5 hours ago·verify at source
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