Vulnerability in Arm China Star-Mc1
CVE-2021-35465
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- developer.arm.com/support/arm-security-updates (Vendor Advisory)
- developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulne… (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-35465?
- CVE-2021-35465 is a low-severity vulnerability in Arm China Star-Mc1. CVSS score: 3.4/10. Published 2021-08-23.
- How severe is CVE-2021-35465?
- Low severity. CVSS v3 base score is 3.4 out of 10.
- Is CVE-2021-35465 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.