cvedb.io
CVE-2021-3520
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2021-06-02T13:15:13.170 · Last modified 2026-06-17T04:05:17.183

Summary

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

Affected products

lz4_project — lz4

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.