{"id":"CVE-2026-40337","aliases":["EUVD-2026-23603","GHSA-5hgv-rg2f-79pg"],"status":"published","title":"Sentry kernel has incomplete ownership check for IRQ line manipulation","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.","severity":{"version":"3.1","score":5.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00155,"percentile":0.04618,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-283"],"published":"2026-04-17T23:51:09Z","modified":"2026-10-28T02:31:09Z","products":[{"vendor":"camelot-os","product":"sentry-kernel"}],"references":[{"url":"https://github.com/camelot-os/sentry-kernel/security/advisories/GHSA-5hgv-rg2f-79pg","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/camelot-os/sentry-kernel/pull/108","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/camelot-os/sentry-kernel/commit/150b7edd2c5b0da0a8baeed3135ddde613b08081","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40337.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40337","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-40337","title":"Sentry kernel has incomplete ownership check for IRQ line manipulation","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.","status":"published","published":"2026-04-17T23:51:09.866Z","modified":"2026-04-20T16:13:48.908Z","cvss":[{"version":"3.1","score":5.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-283"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-23603","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.","status":"published","published":"2026-04-17T23:51:09Z","modified":"2026-04-20T16:13:48Z","cvss":[{"version":"3.1","score":5.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:24:22.446697Z"}],"nvd":[{"id":"CVE-2026-40337","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.","status":"published","published":"2026-04-18T00:16:37.667Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":5.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-283"],"updated_at":"2026-11-02T14:12:15.120927Z"}],"osv":[{"id":"CVE-2026-40337","title":"Sentry kernel has incomplete ownership check for IRQ line manipulation","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.","status":"published","published":"2026-04-17T23:51:09.866Z","modified":"2026-10-28T02:31:09.662096114Z","cvss":[{"version":"3.1","score":5.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"cwes":["CWE-283"],"updated_at":"2026-11-02T15:45:03.424067Z"}]}}