Description
When using Arm Cortex-M Security Extensions (CMSE), Secure stack contents can be leaked to Non-secure state via floating-point registers when a Secure to Non-secure function call is made that returns a floating-point value and when this is the first use of floating-point since entering Secure state. This allows an attacker to read a limited quantity of Secure stack contents with an impact on confidentiality. This issue is specific to code generated using LLVM-based compilers.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Arm Ltd Arm Compiler for Embedded
Default version status: unaffected
6.6 to ≤ 6.22affected
Arm Ltd Arm Compiler for Embedded FuSa 6.16LTS
Default version status: affected
All versionsaffected
Arm Ltd Arm Compiler for Embedded FuSa 6.21
Default version status: affected
All versionsaffected
Arm Ltd Arm Compiler for Functional Safety 6.6
Default version status: affected
All versionsaffected
Arm Ltd CLang
Default version status: unaffected
13 to ≤ 19affected