VULNERABILITY INTELLIGENCE

CVE-2021-3520

CVSS score9.8 CRITICAL
EPSS probability3.40%
CISA KEVNot currently listed
Published2021-06-02
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • secalert@redhat.com: CWE-190
  • nvd@nist.gov: CWE-190

Primary references