Bug 2567735 (CVE-2026-122130)

Summary: CVE-2026-122130 ipfixcol2: ipfixcol2: Denial of Service via integer overflow in Forwarder output plugin
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in ipfixcol2. An integer overflow in the Forwarder output plugin allows an unauthenticated remote attacker to trigger a heap-based buffer overflow by sending oversized IP Flow Information Export (IPFIX) messages. A successful attack can cause the collector service to crash, leading to a Denial of Service (DoS), or result in memory corruption.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-05 22:22:02 UTC
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.