CVE-2026-40337
Raw vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:HSummary
CVE-2026-40337 is a medium-severity Unverified Ownership (CWE-283) vulnerability. Its CVSS base score is 5.1 (Medium).
Operationally, ranked at the 5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-24 (Access Control Decisions) and AC-25 (Reference Monitor) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-23603
Vulnerability Data
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…
more
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.
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 4 hardening rules · 4 OS baselines
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Mitigating Controls (NIST 800-53 r5) AI
Access enforcement directly requires verifying ownership before granting access to resources.
Requiring access decisions to consider all relevant attributes includes ownership verification.
A reference monitor provides the tamperproof mechanism that can enforce ownership checks.
Associating ownership as a security attribute enables subsequent verification of resource ownership.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Enforcing defined access permissions and authorizations directly prevents missing ownership verification for resources.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Access control policies can require ownership verification before granting access to critical resources.
Identity management processes can include verification of resource ownership during provisioning and access decisions.
Access rights reviews can enforce checks that only legitimate owners retain privileges over critical assets.
Privileged access rights assignment should verify ownership to prevent unauthorized elevation on critical resources.
Information access restriction mechanisms can implement ownership checks before allowing operations on protected resources.
Secure authentication can be extended to verify resource ownership in addition to user identity.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).
Windows Server 2016 (1 rule)
- V-224831 Local volumes must use a format that supports NTFS attributes. prevents CWE-283
Windows Server 2019 (1 rule)
- V-205663 Windows Server 2019 local volumes must use a format that supports NTFS attributes. prevents CWE-283