net-snmp: double free in usm_free_usmStateReference function in snmplib/snmpusm.c via an SNMPv3 GetBulk request
Published Jun 25, 2020
6.5
MEDIUMCVSS 3.1
EPSS 2.31%
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.
Affected products
No data.
Configuration 2
- 8.8
No data.
Red Hat Enterprise Linux 8
net-snmp-1:5.8-12.el8_1.1
Fixed · RHBA-2020:1376
Red Hat Enterprise Linux 8
net-snmp-1:5.8-12.el8_1.1
Fixed · RHBA-2020:1376
Red Hat Enterprise Linux 5
net-snmp
Not affected
Red Hat Enterprise Linux 6
net-snmp
Not affected
Red Hat Enterprise Linux 7
net-snmp
Not affected
Red Hat Enterprise Linux 9
net-snmp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | net-snmp-1:5.8-12.el8_1.1 | Fixed | RHBA-2020:1376 |
| Red Hat Enterprise Linux 8 | net-snmp-1:5.8-12.el8_1.1 | Fixed | RHBA-2020:1376 |
| Red Hat Enterprise Linux 5 | net-snmp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | net-snmp | Not affected | n/a |
| Red Hat Enterprise Linux 7 | net-snmp | Not affected | n/a |
| Red Hat Enterprise Linux 9 | net-snmp | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021-2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (15 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.31% (0.02315) | 82.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.31% (0.02315) | 81.12th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.30% (0.00303) | 51.42th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.59% (0.00586) | 78.90th | v3 (v2023.03.01) |
| May 16, 2024 | 0.59% (0.00586) | 78.06th | v3 (v2023.03.01) |
| Mar 12, 2024 | 0.43% (0.00430) | 73.92th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.53% (0.00527) | 76.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.53% (0.00527) | 73.41th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.12% (0.18119) | 93.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.85% (0.07855) | 85.01th | v1 |
| Jan 6, 2022 | 7.85% (0.07855) | 84.84th | v1 |
| Jan 5, 2022 | 1.86% (0.01865) | 76.93th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (12)
- http://www.openwall.com/lists/oss-security/2020/06/25/4 mailing-listx_refsource_MLISTExploitMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-20892 Vendor Advisory
- https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1663027 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1851145 Issue Tracking
- https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-20892
- https://security.gentoo.org/glsa/202008-12 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://sourceforge.net/p/net-snmp/bugs/2923/ x_refsource_MISCExploitThird Party Advisory
- https://usn.ubuntu.com/4410-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-20892
- https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.