CVE-2024-7883
LowCVSS 3.7Summary
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 returns a floating-point value and 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, impacting confidentiality. The issue is specific to code generated using LLVM-based compilers.
Risk Assessment
An attacker can read a limited amount of Secure stack contents, affecting confidentiality. The risk affects embedded systems with Cortex-M and CMSE.
Recommendation
Update the LLVM compiler to a version containing the fix or apply workarounds recommended by Arm. Review code for calls returning floating-point values in the CMSE context.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS