CVE-2026-40337
Sentry kernel has incomplete ownership check for IRQ line manipulation
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.
INFO
Published Date :
April 18, 2026, 12:16 a.m.
Last Modified :
Oct. 26, 2026, 9:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Sentry kernel to version 0.4.7.
- Reduce tasks with DEV and IO capability to one.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40337.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40337 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40337
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40337 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40337 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: sentry-kernel de camelot-os, Description: El kernel Sentry es una implementación de micro-kernel de alto nivel de seguridad hecha para sistemas embebidos de alta seguridad. Una tarea dada con una de las capacidades DEV o IO es capaz de interactuar con la línea IRQ de otra tarea a través de la familia de syscalls __sys_int_*. Antes de la versión 0.4.7, esto puede llevar a DoS y canales encubiertos entre esta tarea y el mundo exterior. Un parche está disponible en la versión 0.4.7. Como solución alternativa, reduzca las tareas que tienen la capacidad DEV e IO a una sola. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'camelot-os', 'product': 'sentry-kernel', 'versions': [{'status': 'affected', 'version': '< 0.4.7'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40337', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-20T16:13:39.095832Z'} -
New CVE Received by [email protected]
Apr. 18, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H Added CWE CWE-283 Added Reference https://github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135ddde613b08081 Added Reference https://github.com/camelot-os/sentry-kernel/pull/108 Added Reference https://github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg