camelot-os sentry-kernel up to 0.4.6 unverified ownership

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k3.81

Summaryinfo

A vulnerability has been found in camelot-os sentry-kernel up to 0.4.6 and classified as critical. Impacted is an unknown function. This manipulation causes unverified ownership. This vulnerability is registered as CVE-2026-40337. The attack needs to be launched locally. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in camelot-os sentry-kernel up to 0.4.6. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a unverified ownership vulnerability. The CWE definition for the vulnerability is CWE-283. The product does not properly verify that a critical resource is owned by the proper entity. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-40337 since 04/11/2026. The exploitation appears to be easy. An attack has to be approached locally. The exploitation requires an enhanced level of successful authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.4.7 eliminates this vulnerability. Applying the patch 150b7edd2c5b0da0a8baeed3135ddde613b08081 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.1
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unverified ownership
CWE: CWE-283 / CWE-282 / CWE-284
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: sentry-kernel 0.4.7
Patch: 150b7edd2c5b0da0a8baeed3135ddde613b08081

Timelineinfo

04/11/2026 CVE reserved
04/18/2026 +7 days Advisory disclosed
04/18/2026 +0 days VulDB entry created
04/18/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5hgv-rg2f-79pg
Status: Confirmed

CVE: CVE-2026-40337 (🔒)
GCVE (CVE): GCVE-0-2026-40337
GCVE (VulDB): GCVE-100-358165

Entryinfo

Created: 04/18/2026 09:02
Changes: 04/18/2026 09:02 (66)
Complete: 🔍
Cache ID: 216::103

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