{"id":"UBUNTU-CVE-2026-122130","details":"CESNET ipfixcol2 2.3.0 before 2.9.0 contains an integer overflow vulnerability in the Forwarder output plugin that allows unauthenticated IPFIX exporters to overflow a heap buffer by wrapping uint16_t message length counters. Attackers can send near-65535-byte data sets and large templates to a collector forwarding over TCP to crash it and perform 2-byte writes to attacker-influenced addresses.","modified":"2026-11-06T01:00:24.496595820Z","published":"2026-11-05T00:00:00Z","upstream":["CVE-2026-122130"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-122130"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-122130"},{"type":"REPORT","url":"https://github.com/CESNET/ipfixcol2"},{"type":"REPORT","url":"https://github.com/CESNET/ipfixcol2/blob/v2.8.0/src/plugins/output/forwarder/src/Message.cpp#L134-L156"},{"type":"REPORT","url":"https://github.com/CESNET/ipfixcol2/commit/ad206f6217257b06b139f1b2bce50d52f5bc6acb"},{"type":"REPORT","url":"https://github.com/CESNET/ipfixcol2/releases/tag/v2.9.0"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/cesnet-ipfixcol2-2.3.0-before-2.9.0-buffer-overflow-via-forwarder-output-plugin"}],"affected":[{"package":{"name":"ipfixcol2","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/ipfixcol2?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.8.0+20260519-1","2.8.0+20260519-2","2.8.0+20260701-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.8.0+20260701-1","binary_name":"ipfixcol2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122130.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}