Cortex M33 Firmware
CVE-2021-35465
LOW
Severity by source
AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionNVD
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).
AnalysisAI
Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction. Rated low severity (CVSS 3.4), this vulnerability is low attack complexity. No vendor patch available.
Technical ContextAI
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). Affected products include: Arm Cortex-M33 Firmware, Arm Cortex-M35P Firmware, Arm Cortex-M55 Firmware, Arm China Star-Mc1 Firmware. Version information: before 2021.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Same technique Information Disclosure
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External POC / Exploit Code
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