CVE-2021-35465 Information disclosure in n/a
A flaw in Arm Cortex-M processors allows a non-secure handler to read or write secure context memory due to improper exception handling in VLLDM instructions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-35465?
CVE-2021-35465 is a low-severity vulnerability in n/a, published on 23 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Which versions are affected by CVE-2021-35465?
It affects 4 products.
Products include Arm China Star-Mc1 Firmware, Arm Cortex-M33 Firmware, Arm Cortex-M35p Firmware, Arm Cortex-M55 Firmware.
How do I fix CVE-2021-35465?
No fix has been published for CVE-2021-35465 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-35465 being exploited?
There is no known exploitation of CVE-2021-35465 in the wild and no public exploit code.
Sources
Also known as GHSA-2g78-x942-h8vj.