The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).
https://github.com/collectd/collectd/releases/tag/collectd-5.6.3
https://github.com/collectd/collectd/issues/2291
https://github.com/collectd/collectd/commit/d16c24542b2f96a194d43a73c2e5778822b9cb47
https://bugs.debian.org/881757
https://security.gentoo.org/glsa/201803-10
https://access.redhat.com/errata/RHSA-2018:2615
https://access.redhat.com/errata/RHSA-2018:1605
https://access.redhat.com/errata/RHSA-2018:0560
https://access.redhat.com/errata/RHSA-2018:0299
https://access.redhat.com/errata/RHSA-2018:0252
Source: Mitre, NVD
Published: 2017-11-14
Updated: 2025-04-20
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.03516