What’s Vulnerable › Vulnerabilities

CVE-2026-40337: Sentry kernel has incomplete ownership check for IRQ line manipulation

• Severity: medium (CVSS 5.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-18 · updated 2026-10-26
• Weakness: CWE-283

Description

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.

Affected products

• camelot-os sentry-kernel: before 0.4.7

References

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

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