CVE-2007-3843: The Linux kernel before 2.6.23-rc1 checks the wrong global variable for the CIFS sec mount option, which mi...

Security readout for executives and security teams

This flaw affects old Linux CIFS clients. A system could be configured to require security signatures for CIFS traffic, but the kernel might fail to enforce that setting. That could let a remote attacker spoof CIFS network traffic despite the client appearing to request signed communication. Exposure is most plausible on legacy Linux systems using CIFS mounts with security-signing expectations. The bundle does not provide exact distribution package versions, but Debian, Red Hat, Ubuntu, SUSE, Avaya, OVAL, and SecurityFocus references indicate vendor tracking. Treat this as a legacy infrastructure risk, not a broad emergency. Prioritize systems still running old kernels, especially those mounting CIFS shares across less trusted networks or in regulated environments where traffic integrity is required. Mitigation focus: Apply vendor kernel updates that address CVE-2007-3843.; Upgrade kernels to a fixed lineage at or after 2.6.23-rc1 where applicable.; Review Debian, Red Hat, Ubuntu, SUSE, and appliance advisories for exact affected packages..

Prepared

Jun 29, 2026, 04:07 UTC (UTC+00:00)

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