{"id":"CVE-2022-21505","title":"In the linux kernel, if IMA appraisal is used with the \"ima_appraise=log\" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable","summary":"In the linux kernel, if IMA appraisal is used with the \"ima_appraise=log\" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting \"ima_appraise=log\" from the boot p…","severity":"medium","cvss":6.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-346"],"vendor":"oracle","product":"linux","affected":["linux = 7","linux = 8","linux = 9"],"published":"2024-12-24","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:25.003","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-21505","references":[{"url":"https://git.kernel.org/linus/543ce63b664e2c2f9533d089a4664b559c3e6b5b","label":"secalert_us@oracle.com"},{"url":"https://linux.oracle.com/cve/CVE-2022-21505.html","label":"secalert_us@oracle.com"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00201,"epssPercentile":0.0925,"ingestedAt":"2026-10-14T16:40:32.049Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2024-12-27T16:51:57.672286Z"},"slug":"CVE-2022-21505","body":"## Overview\n\nIn the linux kernel, if IMA appraisal is used with the \"ima_appraise=log\" boot param, lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting \"ima_appraise=log\" from the boot param when Secure Boot is enabled, but this does not cover cases where lockdown is used without Secure Boot. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity, Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).\n\n## Affected\n\n- `linux = 7`\n- `linux = 8`\n- `linux = 9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":36.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}