Vulnerability in Sentry Kernel by Camelot OS Affects High Security Embedded Systems
CVE-2026-40337

5.1MEDIUM

Key Information:

Vendor

Camelot-os

Status
Sentry-kernel
Vendor
CVE Published:
17 April 2026

What is CVE-2026-40337?

The Sentry kernel is designed as a high security micro-kernel for embedded systems. A vulnerability exists prior to version 0.4.7 where tasks with DEV or IO capabilities can improperly interact with other tasks' IRQ lines through the _sys_int* syscall family. This misconfiguration can lead to Denial of Service attacks and the potential for covert channels between tasks and external environments. To mitigate this risk, users are advised to upgrade to version 0.4.7 or limit the number of tasks with DEV and IO capabilities to one.

Affected Version(s)

sentry-kernel < 0.4.7

References

https://github.com/camelot-os/sentry-kernel/security/advi...
x_refsource_CONFIRM
https://github.com/camelot-os/sentry-kernel/pull/108
x_refsource_MISC
https://github.com/camelot-os/sentry-kernel/commit/150b7e...
x_refsource_MISC

CVSS V3.1

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.