CVE-2023-4280: An unvalidated input in Silicon Labs TrustZone implementation in v4.3.x and earlier of the Gecko SDK allows an

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CRITICAL 9.3UPGRADE

CVE-2023-4280 is a critical-severity flaw (CVSS 9.3) affecting gecko software development kit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An unvalidated input in Silicon Labs TrustZone implementation in v4.3.x and earlier of the Gecko SDK allows an attacker to access the trusted region of memory from the untrusted region.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-125, CWE-787
Published	2024-01-02
Last modified	2026-06-17

Publisher (CNA): Silicon Labs · Vendor: silabs

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

Am I affected?

Timeline

2024-01-02 17:15 UTCPublished CVE record published
2026-06-17 06:37 UTCUpdated Record last modified

silabs gecko software development kit UPGRADE

Affected: >= 1.0.0 and <= 4.3.2

Fixed in: newer than 4.3.2

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy gecko-software-development-kit || rpm -q gecko-software-development-kit || gecko-software-development-kit --version

2. UPGRADE to newer than 4.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gecko-software-development-kit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gecko-software-development-kit

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 1.0.0 (Debian / Ubuntu)

apt-cache madison gecko-software-development-kit sudo apt install gecko-software-development-kit=<VERSION_BEFORE_1.0.0> sudo apt-mark hold gecko-software-development-kit

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

dnf --showduplicates list gecko-software-development-kit sudo dnf downgrade gecko-software-development-kit-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add gecko-software-development-kit

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-2023-4280?

gecko software development kit: upgrade to newer than 4.3.2. Exact commands for each OS are on this page.

Is CVE-2023-4280 being exploited?

CVE-2023-4280 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-2023-4280 affect?

CVE-2023-4280 affects gecko software development kit. Severity is critical (CVSS 9.3). An unvalidated input in Silicon Labs TrustZone implementation in v4.3.x and earlier of the Gecko SDK allows an attacker to access the trusted region of memory from the untrusted region.

How urgent is CVE-2023-4280?

Priority 41/100. Critical severity

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References

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