CVE-2024-7883: When using Arm Cortex-M Security Extensions (CMSE), Secure stack contents can be leaked to Non-secure state v

This week

LOW 3.7REMOTEUPGRADEDOWNGRADEDOWNGRADE

CVE-2024-7883 is a low-severity flaw (CVSS 3.7) affecting arm compiler for embedded, arm compiler for embedded fusa, arm compiler for functional safety. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 g

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	3.7 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-226
Published	2024-10-31
Last modified	2026-06-17

Publisher (CNA): Arm Limited · Vendor: arm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-10-31 17:15 UTCPublished CVE record published
2026-06-17 08:21 UTCUpdated Record last modified

arm arm compiler for embedded UPGRADE

Affected: >= 6.6 and < 6.23

Fixed in: 6.23

Safe to downgrade to: a release before 6.6

1. Check installed version

apt-cache policy arm-compiler-for-embedded || rpm -q arm-compiler-for-embedded || arm-compiler-for-embedded --version

2. UPGRADE to 6.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade arm-compiler-for-embedded

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade arm-compiler-for-embedded

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.6 (Debian / Ubuntu)

apt-cache madison arm-compiler-for-embedded sudo apt install arm-compiler-for-embedded=<VERSION_BEFORE_6.6> sudo apt-mark hold arm-compiler-for-embedded

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list arm-compiler-for-embedded sudo dnf downgrade arm-compiler-for-embedded-<VERSION_BEFORE_6.6> sudo dnf versionlock add arm-compiler-for-embedded

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

arm arm compiler for embedded fusa DOWNGRADE

Affected: 6.16 · 6.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.16

1. Check installed version

apt-cache policy arm-compiler-for-embedded-fusa || rpm -q arm-compiler-for-embedded-fusa || arm-compiler-for-embedded-fusa --version

2. No fixed release: DOWNGRADE to a release before 6.16 (Debian / Ubuntu)

apt-cache madison arm-compiler-for-embedded-fusa sudo apt install arm-compiler-for-embedded-fusa=<VERSION_BEFORE_6.16> sudo apt-mark hold arm-compiler-for-embedded-fusa

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list arm-compiler-for-embedded-fusa sudo dnf downgrade arm-compiler-for-embedded-fusa-<VERSION_BEFORE_6.16> sudo dnf versionlock add arm-compiler-for-embedded-fusa

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

arm arm compiler for functional safety DOWNGRADE

Affected: 6.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.6

1. Check installed version

apt-cache policy arm-compiler-for-functional-safety || rpm -q arm-compiler-for-functional-safety || arm-compiler-for-functional-safety --version

2. No fixed release: DOWNGRADE to a release before 6.6 (Debian / Ubuntu)

apt-cache madison arm-compiler-for-functional-safety sudo apt install arm-compiler-for-functional-safety=<VERSION_BEFORE_6.6> sudo apt-mark hold arm-compiler-for-functional-safety

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list arm-compiler-for-functional-safety sudo dnf downgrade arm-compiler-for-functional-safety-<VERSION_BEFORE_6.6> sudo dnf versionlock add arm-compiler-for-functional-safety

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

arm clang UPGRADE

Affected: >= 11.0.0 and < 20.1.0

Fixed in: 20.1.0

Safe to downgrade to: a release before 11.0.0

1. Check installed version

apt-cache policy clang || rpm -q clang || clang --version

2. UPGRADE to 20.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade clang

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clang

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 11.0.0 (Debian / Ubuntu)

apt-cache madison clang sudo apt install clang=<VERSION_BEFORE_11.0.0> sudo apt-mark hold clang

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list clang sudo dnf downgrade clang-<VERSION_BEFORE_11.0.0> sudo dnf versionlock add clang

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-7883?

arm compiler for embedded: upgrade to 6.23; arm compiler for embedded fusa: downgrade or apply the listed mitigation; arm compiler for functional safety: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-7883 being exploited?

CVE-2024-7883 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-7883 affect?

CVE-2024-7883 affects arm compiler for embedded, arm compiler for embedded fusa, arm compiler for functional safety. Severity is low (CVSS 3.7). 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

How urgent is CVE-2024-7883?

Priority 33/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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