Out-of-bounds read in nfdump - #VU142753
Published: August 15, 2026
Vulnerability identifier: #VU142753
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the sFlow 802.11 MAC parser when processing wireless bridge frames. A remote attacker can send a specially crafted sFlow record to disclose sensitive information.
Only 802.11 data frames with both ToDS and FromDS flags set trigger the read past the header boundary, and 6 bytes are copied into flow records where they remain visible to readers of the stored flow data.
Affected software
nfdump
Remediation
Install security update from vendor's website.
nfdump - update to 1.7.9