Sentry kernel has incomplete ownership check for IRQ line manipulation

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Summary

CVECVE-2026-40337
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-18 00:16:37 UTC
Updated2026-04-18 00:16:37 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 5.1 MEDIUM from [email protected]

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

Problem Types: CWE-283 | CWE-283 CWE-283: Unverified Ownership

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
3.1CNADECLARED5.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Camelot-os Sentry-kernel affected < 0.4.7 Not specified

References

ReferenceSourceLinkTags
github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg [email protected] github.com
github.com/camelot-os/sentry-kernel/pull/108 [email protected] github.com
github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135dd... [email protected] github.com
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