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CVE-2019-20892

net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c...

6.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

2.31%Up 0.5 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

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.

Record
CVE-2019-20892
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-415
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2019-20892
Updated
2026-11-02
EUVDEUVD-2019-11428 No score

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.

Record
EUVD-2019-11428
Updated
2026-11-03
GitHub AdvisoriesGHSA-8q2p-wr8q-hv7c 6.5

net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c...

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.

Record
GHSA-8q2p-wr8q-hv7c
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-415
Updated
2026-11-02
OSVALPINE-CVE-2019-20892 6.5

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.

Record
ALPINE-CVE-2019-20892
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 6.5

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.

Record
CVE-2019-20892
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
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OSVDEBIAN-CVE-2019-20892 6.5

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.

Record
DEBIAN-CVE-2019-20892
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHBA-2020:1376 6.5

Red Hat Bug Fix Advisory: net-snmp bug fix and enhancement update

Record
RHBA-2020:1376
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-20892 6.5

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.

Record
UBUNTU-CVE-2019-20892
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUSN-4410-1 No score

net-snmp vulnerability

A double-free bug was discovered in snmpd server. An authenticated user could potentially cause a DoS by sending a crafted request to the server. (CVE-2019-20892)

Record
USN-4410-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
net-snmp
Alpine:v3.11
 before 5.8-r0
5.8-r0
net-snmp
Alpine:v3.12
 before 5.8-r0
5.8-r0
net-snmp
Debian:12
 before 5.8+dfsg-3
5.8+dfsg-3
net-snmp
Debian:13
 before 5.8+dfsg-3
5.8+dfsg-3
net-snmp
Debian:14
 before 5.8+dfsg-3
5.8+dfsg-3
net-snmp
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-agent-libs
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-agent-libs-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-debugsource
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
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Affected packages
PackageAffectedFixed
net-snmp-devel
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-libs-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-perl-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-utils
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-utils-debuginfo
Red Hat:enterprise_linux:8::appstream
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-agent-libs-debuginfo
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-debuginfo
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-debugsource
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-libs
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-libs-debuginfo
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-perl-debuginfo
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp-utils-debuginfo
Red Hat:enterprise_linux:8::baseos
 before 1:5.8-12.el8_1.1
1:5.8-12.el8_1.1
net-snmp
Ubuntu:20.04:LTS
 before 5.8+dfsg-2ubuntu2.1, plus listed versions
5.7.3+dfsg-5ubuntu55.7.3+dfsg-5ubuntu65.8+dfsg-2ubuntu15.8+dfsg-2ubuntu2
5.8+dfsg-2ubuntu2.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-20892 is a medium vulnerability (CVSS 6.5) in Net-snmp, published June 25, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.31%, the 83rd percentile. Fixed in net-snmp 5.8-r0.

References

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