CVE-2026-72712

Summary

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.

Affected Software

Weaknesses

• CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

References

• https://github.com/nmap/nmap
• https://github.com/nmap/nmap/issues/3368
• https://github.com/nmap/nmap/commit/7ef4ee030a0023fe22616387a000032e1a678b6a
• https://www.vulncheck.com/advisories/nmap-denial-of-service-via-zero-length-tcp-option-packet

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