CVE-2006-5755: Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during...

Security readout for executives and security teams

This is an old Linux kernel flaw that could let a local user crash an affected x86_64 system. It is not described as remote code execution or privilege escalation in the provided sources. Business urgency is mainly for legacy or embedded systems still running pre-2.6.18 kernels or unpatched vendor kernels. Exposure is most likely on obsolete x86_64 Linux systems, long-lived appliances, or virtualized hosts using old vendor kernels without the relevant backport. Supported modern Linux distributions are unlikely to be affected, but vendor kernel versions must be checked because backported fixes may not match upstream version numbers. Treat this as a legacy-system hygiene issue with availability impact. It should not displace active remote-code-execution remediation, but any affected shared or business-critical host should be patched or retired promptly because a local crash can interrupt services. Mitigation focus: Identify x86_64 Linux hosts running kernels older than 2.6.18.; Apply vendor kernel updates referenced by the relevant distribution advisory.; Replace unsupported legacy kernels with supported distribution kernels..

Prepared

Jun 29, 2026, 08:16 UTC (UTC+00:00)

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