Integer overflow in nfdump - #VU142755
Published: August 15, 2026
Vulnerability identifier: #VU142755
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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 corrupted flow records.
The vulnerability exists due to integer overflow in the sFlow extended gateway communities parser when parsing a crafted sFlow packet. A remote attacker can supply a crafted communities length value to misalign subsequent parsing and cause corrupted flow records.
In DEVEL builds, the issue can also trigger an out-of-bounds read that may crash the process.
Affected software
nfdump
Remediation
Install security update from vendor's website.
nfdump - update to 1.7.9