{"cve":"CVE-2021-35465","nvd":{"published":"2021-08-23T13:15:07.667","modified":"2026-06-17T03:57:31.683","status":"Modified","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).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N","score":3.4},"cwes":[],"references":["https://developer.arm.com/support/arm-security-updates","https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability","https://developer.arm.com/support/arm-security-updates","https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability"],"products":["arm:china_star-mc1_firmware","arm:cortex-m33_firmware","arm:cortex-m35p_firmware","arm:cortex-m55_firmware"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2021-35465","score":0.00298,"percentile":0.22518,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}