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.
History

Mon, 20 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 20 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Camelot-os
Camelot-os sentry-kernel
Vendors & Products Camelot-os
Camelot-os sentry-kernel

Sat, 18 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title Sentry kernel has incomplete ownership check for IRQ line manipulation
Weaknesses CWE-283
References
Metrics cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-17T23:51:09.866Z

Updated: 2026-04-20T16:13:48.908Z

Reserved: 2026-04-10T22:50:01.358Z

Link: CVE-2026-40337

cve-icon Vulnrichment

Updated: 2026-04-20T16:13:43.170Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-18T00:16:37.667

Modified: 2026-04-20T19:03:07.607

Link: CVE-2026-40337

cve-icon Redhat

No data.