High8.1Red Hat & Ubuntu Linux
IPv6 subnet rule bypass due to incorrect masking operation
CVE-2026-44249 Published Jun 11, 2026
CVE-2026-44249
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
IPv6 subnet rule bypass due to incorrect masking operation. Red Hat rates this important (CVSS 8.1). Weakness: CWE-1287. Affected package(s): netty-handler, offline-knowledge-portal/rhokp-rhel9:1782239370. Resolved in Red Hat advisory RHSA-2026:26586 — update the affected packages (`sudo dnf update`).
Affected versions
- netty-handler
- offline-knowledge-portal/rhokp-rhel9:1782239370
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Fixed versions
- RHSA-2026:26586
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26586 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.