CVE-2009-4026

CVE-2009-4026 describes a denial-of-service vulnerability in the mac80211 subsystem of the Linux kernel, affecting versions prior to 2.6.32-rc8-next-20091201. Remote attackers can trigger a system panic by sending a specially crafted Delete Block ACK (DELBA) packet, stemming from an erroneous code change. With a CVSS score of 7.8, this vulnerability is considered high severity due to its network-based attack vector, low attack complexity, and potential for complete system unavailability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.