Medium5.3Red Hat Linux Updated
Denial of Service due to stack out-of-bounds write via crafted DHCPv6 message
CVE-2026-56114 Published Jun 23, 2026Updated by vendor Jun 23, 2026
Affected products & platforms
Red Hat LinuxUnclassified
Summary
Denial of Service due to stack out-of-bounds write via crafted DHCPv6 message. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-787.
Mitigation checklist
Recommended fix / mitigation
- To mitigate this issue, restrict network access to systems running dhcpcd to trusted networks only. If DHCPv6 is not required, it can be disabled by configuring dhcpcd to ignore IPv6 or by disabling IPv6 on the network interfaces. Consult your system's network configuration documentation for specific instructions on disabling DHCPv6 for dhcpcd or network interfaces. A service restart may be required for changes to take effect.
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
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