# CVE-2024-7883: CMSE secure state may leak from stack to floating-point registers

> Attackers can read Secure stack contents via floating-point registers when using Arm CMSE with LLVM-based compilers, compromising confidentiality.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 31 Oct 2024
- **Updated:** 31 Oct 2024
- **Also known as:** AZL-53888, BELL-CVE-2024-7883, CLSA-2026-1791537402, DEBIAN-CVE-2024-7883, ECHO-5e0e-5634-4e9c, GHSA-vwj9-2733-p4wv, OESA-2026-1968, OESA-2026-2072, OESA-2026-2073, OESA-2026-2074, UBUNTU-CVE-2024-7883

## What is CVE-2024-7883?

CVE-2024-7883 is a low-severity vulnerability in Arm Compiler for Embedded, published on 31 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-226 (Sensitive Information in Resource Not Removed Before Reuse)

## Which versions are affected by CVE-2024-7883?

It affects 4 products.


Products: Arm Arm Compiler for Embedded, Arm Arm Compiler for Embedded Fusa, Arm Arm Compiler for Functional Safety, Arm Clang.

## How do I fix CVE-2024-7883?

Apply the vendor's patch.

## Is CVE-2024-7883 being exploited?

There is no known exploitation of CVE-2024-7883 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-7883 and fix it if it is affected.

What it is: CVE-2024-7883 is a low-severity vulnerability in Arm Compiler for Embedded, published on 31 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-7883 in the wild and no public exploit code.

Affected product: Arm Compiler for Embedded. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-7883/ (Markdown: https://insights.sbomify.com/CVE-2024-7883/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-7883
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-7883
- OSV: https://osv.dev/vulnerability/CVE-2024-7883

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-7883/
Summaries are generated and may contain mistakes; the official description above is the record.