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CVE-2026-40337

Sentry kernel has incomplete ownership check for IRQ line manipulation

Published: Apr 17, 2026Updated: Apr 17, 2026 Sources: CVE List
NVD MITRE
5.1CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:UC:LI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-283CWE-283: Unverified Ownership

Affected Products

sentry-kernel
camelot-os

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg
github.com
https://github.com/camelot-os/sentry-kernel/pull/108
github.com
https://github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135ddde613b08081
github.com

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