VULNERABILITY INTELLIGENCE
CVE-2006-1242
CVSS score5 MEDIUM
EPSS probability3.54%
CISA KEVNot currently listed
Published2006-03-15
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:N
Description
The ip_push_pending_frames function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan (nmap -sI) attack, which bypasses intended protections against such attacks.