Kernel Filter Port Access Control Bypass in CatchPulse

CVE-2026-55978 is an improper access control vulnerability (CWE-284) in CatchPulse that enables non-administrative local attackers to connect directly to an unrestricted kernel filter communication port, circumventing the application's security policy enforcement mechanisms. This vulnerability matters because it provides a pathway for privilege escalation and lateral movement within systems where CatchPulse is deployed for endpoint protection or monitoring. Organizations using CatchPulse—particularly those relying on it for compliance, policy enforcement, or threat detection—are affected, as local users can bypass intended access restrictions and potentially disable or manipulate security controls without administrative credentials.

While this CVE currently maps to zero Casky skills due to the absence of specific MITRE ATT&CK technique mappings, practitioners using Casky's Claude-powered platform with extended reasoning capabilities would benefit from monitoring for behavioral patterns consistent with privilege escalation and defense evasion tactics. The vulnerability's nature—direct kernel-level communication bypass—aligns with post-exploitation activity patterns. Organizations should leverage Casky's 754 mapped security skills to hunt for suspicious local process interactions with kernel interfaces, unauthorized port communications, and policy enforcement failures that would indicate exploitation attempts, even as MITRE technique attribution for this CVE evolves.