CVE-2026-40337 MEDIUM

CVE-2026-40337: Sentry kernel has incomplete ownership check for IRQ line manipulation

Vendor Camelot-Os
Product sentry-kernel
Weakness CWE-283
Published April 17, 2026
Last update April 20, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 17, 2026 CVE published
April 20, 2026 Record updated

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