VULNERABILITY INTELLIGENCE
CVE-2026-40337
CVSS score5.1 MEDIUM
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-04-18
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
Description
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.
Weakness classification
- CWE-283: Unverified Ownership