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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:nmap:nmap:*:*:*:*:*:*:*:*

Thu, 13 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 13 Aug 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Nmap
Nmap nmap
Vendors & Products Nmap
Nmap nmap

Tue, 11 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Nmap 7.99 Denial of Service via Zero-Length TCP Option Packet
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T16:51:55.660Z

Reserved: 2026-08-10T13:02:52.001Z

Link: CVE-2026-72712

cve-icon Vulnrichment

Updated: 2026-08-13T14:12:40.943Z

cve-icon NVD

Status : Received

Published: 2026-08-11T18:18:23.550

Modified: 2026-08-13T15:20:03.700

Link: CVE-2026-72712

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T10:39:54Z

Weaknesses