CVE-2021-45929

Name: CVE-2021-45929
Creator: NVD / NIST
Published: 2022-01-01T00:15:08.057+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2021-45929 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from CompileElseBlock and Compile_If).. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from CompileElseBlock and Compile_If).

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.66%

47.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Wasm3 Project	Wasm3	0.5.0

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36551Exploit, Issue Tracking, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wasm3/OSV-2021-1061.yamlThird Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36551Exploit, Issue Tracking, Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wasm3/OSV-2021-1061.yamlThird Party Advisory

Timeline

Published: Jan 1, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45929?

Wasm3 0.5.0 has an out-of-bounds write in CompileBlock (called from CompileElseBlock and Compile_If).

How severe is CVE-2021-45929?

CVE-2021-45929 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45929?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45929?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST