CVE-2021-3520

CriticalCVSS 9.8/10Last modified Oct 14, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-190CWE-787

Affected software

No affected versions have been published.

Timeline

Published
Jun 2, 2021
Last modified
Oct 14, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-352004.8NETSCOUT nGeniusONE 6.3.0 build 1196 allows high-privileged users to achieve Stored Cross-Site Scripting (XSS) in FDSQueryService.CVE-2021-352016.5NEI in NETSCOUT nGeniusONE 6.3.0 build 1196 allows XML External Entity (XXE) attacks.CVE-2021-352024.3NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Authorization Bypass (to access an endpoint) in FDSQueryService.CVE-2021-352035.7NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Arbitrary File Read operations via the FDSQueryService endpoint.CVE-2021-352045.4NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Reflected Cross-Site Scripting (XSS) in the support endpoint.CVE-2021-352055.4NETSCOUT Systems nGeniusONE version 6.3.0 build 1196 allows URL redirection in redirector.CVE-2021-352066.1Gitpod before 0.6.0 allows unvalidated redirects.CVE-2021-352076.1An issue was discovered in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.0 before 9.0.0 Patch 16. An XSS vulnerability exists CVE-2021-352085.4An issue was discovered in ZmMailMsgView.js in the Calendar Invite component in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23. An CVE-2021-352099.8An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9CVE-2021-35214.7There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not CVE-2021-352106.1Contao 4.5.x through 4.9.x before 4.9.16, and 4.10.x through 4.11.x before 4.11.5, allows XSS. It is possible to inject code into the tl_log
CVE-2021-3520: Critical severity, CVSS 9.8 | Vulnix