CVE-2011-2699: The IPv6 implementation in the Linux kernel before 3.1 does not generate Fragment Identification values sep...

Security readout for executives and security teams

Older Linux kernels generated IPv6 fragment IDs in a predictable way. A remote attacker could use crafted traffic to disrupt networking. The sources describe denial of service risk, not code execution or data theft. Likely exposed systems are Linux hosts running kernels before 3.1 with IPv6 enabled. Vendor-backported kernels may already include the fix despite older version strings, so validate by distribution advisory or patch status. Address during normal vulnerability remediation unless critical services still run unsupported pre-3.1 kernels with IPv6 exposed. Business risk is service disruption, especially for internet-facing Linux systems, but sources do not indicate active exploitation. Mitigation focus: Upgrade to a vendor-supported kernel containing the IPv6 fragment ID fix.; Check distribution advisories for backported fixes before relying on version numbers alone.; Review vendor guidance for any recommended IPv6 hardening or temporary mitigations..

Prepared

Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.