CVE-2026-72712CWE-835

CVE-2026-72712

Medium · published August 11, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
41.9
In the wild
Unconfirmed
What it is

Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate objects in an infinite loop, causing an out-of-memory condition that results in application crash.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00499 · 41.9th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-08-11T22:18Z
References (5)
https://github.com/nmap/nmap/issues/3368 · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/nmap/nmap · [email protected]https://github.com/nmap/nmap/commit/7ef4ee030a0023fe22616387a000032e1a678b6a · [email protected]https://github.com/nmap/nmap/issues/3368 · [email protected]https://www.vulncheck.com/advisories/nmap-denial-of-service-via-zero-length-tcp-option-packet · [email protected]
EPSS history
Timeline
  • 11 AUG 17:35Z
    Nmap 7.99 Denial of Service via Zero-Length TCP Option Packet
    cvelistv5