CVE-2024-28123: Wasmi is an efficient and lightweight WebAssembly interpreter with a focus on constrained and embedded systems

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HIGH 7.3REMOTEUPGRADE

CVE-2024-28123 is a high-severity flaw (CVSS 7.3) affecting wasmi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Wasmi is an efficient and lightweight WebAssembly interpreter with a focus on constrained and embedded systems. In the WASMI Interpreter, an Out-of-bounds Buffer Write will arise if the host calls or resumes a Wasm function with more parameters than the default limit (128), as it will surpass the stack value. This doesn’t affect calls from Wasm to Wasm, only from host to Wasm. This vulnerability was patched in version 0.31.1.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-787
Published	2024-03-21
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wasmi-labs

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

Am I affected?

Timeline

2024-03-21 02:52 UTCPublished CVE record published
2026-06-17 07:21 UTCUpdated Record last modified

wasmi-labs wasmi UPGRADE

Affected: >= 0.15.0 and < 0.31.1

Fixed in: 0.31.1

Safe to downgrade to: a release before 0.15.0

1. Check installed version

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

2. UPGRADE to 0.31.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wasmi

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 0.15.0 (Debian / Ubuntu)

apt-cache madison wasmi sudo apt install wasmi=<VERSION_BEFORE_0.15.0> sudo apt-mark hold wasmi

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

dnf --showduplicates list wasmi sudo dnf downgrade wasmi-<VERSION_BEFORE_0.15.0> sudo dnf versionlock add wasmi

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-2024-28123?

wasmi: upgrade to 0.31.1. Exact commands for each OS are on this page.

Is CVE-2024-28123 being exploited?

CVE-2024-28123 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-2024-28123 affect?

CVE-2024-28123 affects wasmi. Severity is high (CVSS 7.3). Wasmi is an efficient and lightweight WebAssembly interpreter with a focus on constrained and embedded systems. In the WASMI Interpreter, an Out-of-bounds Buffer Write will arise if the host calls or resumes a Wasm function with more parame

How urgent is CVE-2024-28123?

Priority 45/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-66627 HIGH 8.4 UPGRADE Wasmi is a WebAssembly interpreter focused on constrained and embedded systems

References

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