CVE-2021-3520EPSS p87.9%
CVE-2021-3520CVE-2021-3520
lz4_project / lz4
Description
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.
Scoring
| CVSS | 9.8 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.22% probability of exploitation · percentile 87.9% · 2026-10-10T12:00:23Z |
| Last modified | 2026-10-08 |