{"schemaVersion":3,"id":"CVE-2021-35465","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction. A Non-secure handler may have read or write access to part of a Secure context. This affects Arm Cortex-M33 r0p0 through r1p0, Arm Cortex-M35P r0, Arm Cortex-M55 r0p0 through r1p0, and Arm China STAR-MC1 (in the STAR SE configuration).","dates":{"published":"2021-08-23T12:44:08.000Z","modified":"2024-08-04T00:40:45.965Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.6,"severity":"low","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:L/AC:L/Au:N/C:P/I:P/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":3.4,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":3.6,"severity":"low","vector":"AV:L/AC:L/Au:N/C:P/I:P/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00298,"percentile":0.21135,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00298},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00298,"percentile":0.21135}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-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firmware","label":"cortex-m55_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ r0p0, ≤ r1p0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ r0p0, ≤ r1p0","eol":null,"hubHref":"/vendor/arm/cortex-m55"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://developer.arm.com/support/arm-security-updates","label":"developer.arm.com/support/arm-security-updates","hostname":"developer.arm.com","tags":["X Refsource MISC","Vendor Advisory"]},{"url":"https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability","label":"developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability","hostname":"developer.arm.com","tags":["X Refsource CONFIRM","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-08-23T12:44:08.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T00:40:45.965Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":14,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T23:57:26.526Z","stale":false,"partial":false}}