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.
Published: 2026-08-11
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-11T17:35:06.192Z

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

Link: CVE-2026-72712

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-72712

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses