Out-of-bounds read in FastNetMon - #VU138929
Published: July 21, 2026
Vulnerability identifier: #VU138929
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/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 cause a denial of service.
The vulnerability exists due to out-of-bounds read in parse_packet() in the pcap capture plugin when processing truncated captured frames. A remote attacker can send a specially crafted truncated frame to cause a denial of service.
Only deployments with pcap mode enabled are vulnerable.
Affected software
FastNetMon
Remediation
Cybersecurity Help is not aware of any official solution to address this vulnerability.