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CVE-2026-58302

8.4 · HIGH

rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation.

Published Jun 30, 2026CWE-22EPSS 0.19%

Overview

CVE-2026-58302 is a high-severity vulnerability. It was published on June 30, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation. It is installed SUID root and loads shared library modules via dlopen() by using a user-supplied module name. Insufficient validation of the module name allows path traversal, enabling an unprivileged local user to load an arbitrary shared library. Because the process retains elevated privileges during module loading, this results in local privilege escalation to root.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.debian.org/1140943GitHubgithub.com/LinuxCNC/linuxcnc/commit/00d534c87464a3ed446656998aa02b8abc74b391GitHubgithub.com/LinuxCNC/linuxcnc/commit/ea7cd579d39b586952a42e3da9a26d3e36e7a272GitHubgithub.com/LinuxCNC/linuxcnc/compare/v2.9.8...v2.9.9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-58302?

CVE-2026-58302 is a high-severity vulnerability. It was published on June 30, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-58302?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-58302?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-58302?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-58302 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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