CVE-2026-15811 in kronosnet
Summary
by MITRE • 07/21/2026
A vulnerability was found in kronosnet's (version <=1.34) cryptographic configuration management. The framework does not correctly zero-out or wipe sensitive memory segments after executing changes to its cryptographic configuration. This omission leaves raw encryption keys resident in memory after the associated structures are freed. A local attacker capable of leveraging memory disclosure techniques could exploit this flaw to retrieve the active encryption key, allowing them to decrypt cluster network communications or inject malicious packets to cause severe high-availability cluster instability.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability in kronosnet version 1.34 represents a critical cryptographic memory management flaw that directly impacts the security posture of high-availability cluster environments. This issue falls under the category of improper cleanup of sensitive data, which is classified as CWE-256 in the Common Weakness Enumeration catalog, and specifically relates to insufficient clearing of sensitive data from memory. The cryptographic configuration management framework fails to properly implement secure memory deallocation practices, creating persistent security risks that extend beyond the typical lifecycle of memory structures.
The technical flaw manifests when the system modifies cryptographic configurations and subsequently frees associated memory structures without adequately zeroing out or wiping sensitive memory segments containing encryption keys. This oversight creates a memory persistence vulnerability where raw encryption keys remain accessible in memory even after the original data structures have been deallocated. The memory retention occurs at the application level during runtime, making it particularly dangerous as attackers can leverage various memory disclosure techniques to access these remnants. The flaw is particularly concerning because it affects the core cryptographic functions that protect cluster network communications and maintain system integrity.
The operational impact of this vulnerability extends far beyond simple information disclosure, creating significant risks for high-availability cluster environments that depend on secure communication channels. A local attacker with memory disclosure capabilities can exploit this flaw to retrieve active encryption keys, which then enables them to decrypt cluster network communications and potentially inject malicious packets into the cluster. This capability directly violates the confidentiality and integrity principles of secure communications, allowing attackers to manipulate cluster operations and potentially cause system instability or complete cluster failure. The vulnerability essentially provides an attacker with a backdoor that can be used to compromise the entire cluster's communication security.
Mitigation strategies for this vulnerability require immediate attention and should include comprehensive memory sanitization practices throughout the cryptographic configuration management process. Organizations must implement proper secure memory deallocation procedures that ensure sensitive data is completely overwritten before memory structures are freed, aligning with industry standards such as those recommended in the NIST SP 800-57 guidelines for cryptographic key management. The solution involves modifying the kronosnet framework to incorporate secure memory clearing functions after any cryptographic configuration changes, ensuring that encryption keys and other sensitive data are properly wiped from memory. Additionally, system administrators should implement monitoring solutions that can detect anomalous memory access patterns and consider upgrading to versions of kronosnet that have addressed this specific vulnerability through proper secure memory management implementation.