CVE-2019-20892

Name: CVE-2019-20892
Creator: NVD / NIST
Published: 2020-06-25T10:15:10.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.31%

Last modified Jun 17, 2026

CVE-2019-20892 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.. EPSS estimates a 2.31% chance of exploitation in the next 30 days.

Description

net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.31%

81.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Net-Snmp	Net-Snmp	<= 5.8
Oracle	Zfs Storage Appliance Kit	8.8

References

http://www.openwall.com/lists/oss-security/2020/06/25/4Exploit, Mailing List, Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1663027Exploit, Issue Tracking, Third Party Advisory
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9Patch, Third Party Advisory
https://security.gentoo.org/glsa/202008-12Third Party Advisory
https://sourceforge.net/p/net-snmp/bugs/2923/Exploit, Third Party Advisory
https://usn.ubuntu.com/4410-1/Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/06/25/4Exploit, Mailing List, Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027Exploit, Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1663027Exploit, Issue Tracking, Third Party Advisory
https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9Patch, Third Party Advisory
https://security.gentoo.org/glsa/202008-12Third Party Advisory
https://sourceforge.net/p/net-snmp/bugs/2923/Exploit, Third Party Advisory
https://usn.ubuntu.com/4410-1/Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory

Timeline

Published: Jun 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20892?

How severe is CVE-2019-20892?

CVE-2019-20892 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.31% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20892?

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-2019-20892?

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

Scan your code now

Source: NVD / NIST