CVE-2026-6855
7.1Red Hat · Red Hat Enterprise Linux AI (RHEL AI)
A path traversal vulnerability in the InstructLab chat session handler allows a local attacker to create directories and write files to arbitrary system locations via the logs_dir parameter.
Executive summary
A path traversal vulnerability in Red Hat Enterprise Linux AI (RHEL AI) 3 allows local attackers to perform unauthorized file operations, posing a significant risk of data compromise.
Vulnerability
This is a path traversal flaw (CWE-22) occurring within the InstructLab chat session handler. A local attacker with low privileges can manipulate the logs_dir parameter to bypass directory restrictions, enabling the creation of new directories and the writing of files to arbitrary system locations.
Business impact
The ability to write files to arbitrary locations on a system can lead to unauthorized data modification, disclosure of sensitive information, or the potential for privilege escalation if configuration files are overwritten. With a CVSS score of 7.1, this vulnerability represents a high risk to the confidentiality and integrity of the affected host environment, necessitating prompt attention despite the requirement for local access.
Remediation
Immediate Action: Review the official Red Hat security advisory for the availability of a patched release or configuration-based hotfix for RHEL AI 3 and apply it immediately.
Proactive Monitoring: Monitor system logs for unusual file system activity or attempts to access directories outside of expected application paths, particularly involving the InstructLab service.
Compensating Controls: Implement strict file system permissions and least-privilege policies to ensure that the user account running the InstructLab service cannot write to sensitive system directories.
Exploitation status
Public Exploit Available: No
Analyst recommendation
Given the potential for unauthorized file system modifications, administrators should prioritize the remediation of this flaw in environments where RHEL AI 3 is deployed. While the vulnerability requires local access, the resulting impact on system integrity is severe, and applying vendor-supplied security updates remains the most effective method to mitigate this risk.
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Sources
Originally found and disclosed by Red Hat would like to thank Martin Brodeur (independent security researcher) for reporting this issue., per the CVE Program record.
- Vulnerability database entry
- RHBZ#2460013 Issue tracker