Security researcher Andres Blanco from CoreSecurity discovered a serious vulnerability in two Wireless Broadcom chipsets used in Smartphones. The issue does not in any way compromise the security of users data. An attacker can send a RSN (802.11i) information element, which causes the Wi-Fi NIC to stop responding. Broadcom has a patch available that addresses the issue and makes devices that include the BCM4325 and BCM 4329 immune to a potential attack. The patch is available at Advisory.com.
Source: https://thehackernews.com/2012/10/smartphone-wireless-chipset-vulnerable.html