CVE Catalog

CVE-2026-40337

MediumCVSS 5.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.16%

5th percentile - higher than 5% of all known CVEs

Summary

The Sentry kernel is a high security level micro-kernel implementation made for high security embedded systems. A task with one of the DEV or IO capability is able to interact with another task's IRQ line through the __sys_int_* syscall family. Prior to version 0.4.7, this can lead to DoS and covert channels between this task and the outer world.

Risk Assessment

This may allow a task with DEV or IO capability to disrupt other tasks or create covert channels, violating system isolation and security. Organizations using Sentry kernel in embedded systems are exposed to internal attacks.

Recommendation

Update Sentry kernel to version 0.4.7 or later. As a workaround, reduce tasks that have both DEV and IO capability to a single one.

Related vulnerabilities

Original NVD description (English source)

The Sentry kernel is a high security level micro-kernel implementation made for high security embedded systems. A given task with one of the DEV or IO capability is able to interact with another task's IRQ line through the __sys_int_* syscall familly. Prior to version 0.4.7, this can lead to DoS and covert-channels between this task and the outer world. A patch is available in version 0.4.7. As a workaround, reduce tasks that have the DEV and IO capability to a single one.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS