{"id":"CVE-2023-5370","aliases":["EUVD-2023-57686","GHSA-vf42-37cv-443p"],"status":"published","title":"arm64 boot CPUs may lack speculative execution protections","description":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00201,"percentile":0.10119,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-665"],"published":"2023-10-04T03:59:45Z","modified":"2026-06-17T06:48:26Z","products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-23:14.smccc.asc","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20231124-0005/","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5370"},{"url":"https://github.com/advisories/GHSA-vf42-37cv-443p"}],"sources":{"cve":[{"id":"CVE-2023-5370","title":"arm64 boot CPUs may lack speculative execution protections","description":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.","status":"published","published":"2023-10-04T03:59:45.199Z","modified":"2025-02-13T17:20:10.97Z","cwes":["CWE-665"],"updated_at":"2026-11-02T14:35:16.771348Z"}],"euvd":[{"id":"EUVD-2023-57686","description":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.","status":"published","published":"2023-10-04T03:59:45Z","modified":"2025-02-13T17:20:10Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"none"}],"updated_at":"2026-11-03T00:03:48.029386Z"}],"ghsa":[{"id":"GHSA-vf42-37cv-443p","title":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized....","description":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.","status":"published","published":"2023-10-04T06:30:22Z","modified":"2023-11-24T09:30:28Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:55:05.78804Z"}],"nvd":[{"id":"CVE-2023-5370","description":"On CPU 0 the check for the SMCCC workaround is called before SMCCC support has been initialized. This resulted in no speculative execution workarounds being installed on CPU 0.","status":"published","published":"2023-10-04T04:15:15.593Z","modified":"2026-06-17T06:48:26.79Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:08:35.022405Z"}]}}