{"id":"DEBIAN-CVE-2026-122129","details":"CESNET ipfixcol2 2.7.1 before 2.9.0 contains a memory allocation vulnerability in Lz4Decoder::read_start_header() that allows unauthenticated attackers to exhaust memory by declaring unbounded ring buffer sizes. Attackers can open TCP connections sending LZ4 start headers with very large buffer sizes, forcing up to 4 GiB allocations per connection and denying collector service.","modified":"2026-11-06T01:00:51.542777244Z","published":"2026-11-04T21:18:08.380Z","upstream":["CVE-2026-122129"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-122129"}],"affected":[{"package":{"name":"ipfixcol2","ecosystem":"Debian:14","purl":"pkg:deb/debian/ipfixcol2?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.0-1"}]}],"versions":["2.8.0+20260519-1","2.8.0+20260519-2","2.8.0+20260701-1","2.8.0+20260701-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-122129.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:N/A:L"}]}