CVE-2026-40337 json
Sentry kernel has incomplete ownership check for IRQ line manipulation
published 2026-04-17 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-23603
- cvss
- 5.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/camelot-os/sentry-kernel@150b7ed commit
- github.com/camelot-os/sentry-kernel#108 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.1 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H |
Affected products
- camelot-os sentry-kernel
Classification
- Weakness
-
- CWE-283 Unverified Ownership
References
Sources
- CVE List CVE-2026-40337
- NVD CVE-2026-40337
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