Integer overflow in nfdump - #VU142750
Published: August 15, 2026
Vulnerability identifier: #VU142750
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow or wraparound in PushArrayNextElement and the NBAR/ifvrf option data processing path when processing a crafted IPFIX or NetFlow v9 option template followed by an oversized data flowset. A remote attacker can send crafted UDP datagrams to corrupt the array record header and cause a denial of service.
Exploitation is reachable with two unauthenticated UDP packets to the nfcapd collector: one to install the option template and one to supply the oversized data flowset.
Affected software
nfdump
Remediation
Install security update from vendor's website.
nfdump - update to 1.7.9