CVE-2025-3122: A vulnerability classified as problematic was found in WebAssembly wabt 1.0.36

Routine

LOW 3.1DOWNGRADE

CVE-2025-3122 is a low-severity flaw (CVSS 3.1) affecting webassembly binary toolkit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as problematic was found in WebAssembly wabt 1.0.36. Affected by this vulnerability is the function BinaryReaderInterp::BeginFunctionBody of the file src/interp/binary-reader-interp.cc. The manipulation leads to null pointer dereference. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-404, CWE-476
Published	2025-04-02
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: webassembly

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

Am I affected?

Timeline

2025-04-02 22:15 UTCPublished CVE record published
2026-06-17 09:19 UTCUpdated Record last modified

webassembly webassembly binary toolkit DOWNGRADE

Affected: 1.0.36

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.36

1. Check installed version

apt-cache policy webassembly-binary-toolkit || rpm -q webassembly-binary-toolkit || webassembly-binary-toolkit --version

2. No fixed release: DOWNGRADE to a release before 1.0.36 (Debian / Ubuntu)

apt-cache madison webassembly-binary-toolkit sudo apt install webassembly-binary-toolkit=<VERSION_BEFORE_1.0.36> sudo apt-mark hold webassembly-binary-toolkit

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

dnf --showduplicates list webassembly-binary-toolkit sudo dnf downgrade webassembly-binary-toolkit-<VERSION_BEFORE_1.0.36> sudo dnf versionlock add webassembly-binary-toolkit

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-2025-3122?

webassembly binary toolkit: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-3122 being exploited?

CVE-2025-3122 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-2025-3122 affect?

CVE-2025-3122 affects webassembly binary toolkit. Severity is low (CVSS 3.1). A vulnerability classified as problematic was found in WebAssembly wabt 1.0.36. Affected by this vulnerability is the function BinaryReaderInterp::BeginFunctionBody of the file src/interp/binary-reader-interp.cc. The manipulation leads to n

How urgent is CVE-2025-3122?

Priority 28/100. Public exploit reference

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CVE-2023-46331 MEDIUM 5.5 DOWNGRADE WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in DataSegment::IsValidRange(), which lead to segme

References

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