PT-2026-33535 · Sentry · Sentry

Published 2026-04-17 · Updated 2026-04-18 · CVE-2026-40337

Positive Technologies (AI Summary)

CVSS v3.1

5.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Sentry kernel versions prior to 0.4.7

Description In this high security level micro-kernel implementation for embedded systems, a task possessing either the DEV or IO capability can interact with another task's IRQ line via the ' sys int *' syscall family. This behavior can result in a denial of service and the creation of covert-channels between the task and the outer world.

Recommendations Update to version 0.4.7. As a temporary workaround, reduce the number of tasks that have the DEV and IO capability to a single one.

Fix

Weakness Enumeration

CWE-283

Related Identifiers

CVE-2026-40337

Affected Products

Sentry

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-40337 · Security Note
• https://github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135ddde613b08081 · Note
• https://github.com/camelot-os/sentry-kernel/pull/108 · Note
• https://github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg · Note
• https://twitter.com/VulmonFeeds/status/2045355321510556148 · Twitter Post
• https://twitter.com/CVEnew/status/2045467348597895380 · Twitter Post