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Fencer Vulns
low 3.7

CVE-2024-7883 json

CMSE secure state may leak from stack to floating-point registers

published 2024-10-31 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-48728

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

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.

Patch / fix

  • Arm Ltd Arm Compiler for Embedded 6.23
  • Arm Ltd CLang 20
  • clang Azure Linux 3.0 18.1.2-4

azure linux advisories AZL-53888

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-7883 updated cvss 3.7

clang: CMSE secure state may leak from stack to floating-point registers

  • Red Hat Enterprise Linux 8 clang, clang-libs, python3-clang, clang-analyzer, git-clang-format, clang-tools-extra, +1 more Red Hat Enterprise Linux 9 clang, clang-libs, python3-clang, clang-analyzer, git-clang-format, clang-tools-extra, +1 more
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • developer.arm.com https://developer.arm.com/Arm%20Security%20Center/Cortex-M%20Security%20Extensions%20Vulnerability referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Arm Ltd Arm Compiler for Embedded
  • Arm Ltd Arm Compiler for Embedded FuSa 6.16LTS
  • Arm Ltd Arm Compiler for Embedded FuSa 6.21
  • Arm Ltd Arm Compiler for Functional Safety 6.6
  • Arm Ltd CLang

Classification

Weakness
  • CWE-226 Sensitive Information in Resource Not Removed Before Reuse

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.