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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected products
- Arm Ltd / Arm Compiler for Embedded6.6 – 6.22
- Arm Ltd / Arm Compiler for Embedded FuSa 6.16LTSAll versions – All versions
- Arm Ltd / Arm Compiler for Embedded FuSa 6.21All versions – All versions
- Arm Ltd / Arm Compiler for Functional Safety 6.6All versions – All versions
- Arm Ltd / CLang13 – 19