Kaspersky Labs Antivirus Engine 6.0 for Windows and 5.5-10 for Linux before 20070102 enter an infinite loop upon encountering an invalid NumberOfRvaAndSizes value in the Optional Windows Header of a portable executable (PE) file, which allows remote attackers to cause a denial of service (CPU consumption) by scanning a crafted PE file.

Kaspersky AntiVirus Engine 6.0.1.411 for Windows and 5.5-10 for Linux allows remote attackers to cause a denial of service (CPU consumption) via a crafted UPX compressed file with a negative offset, which triggers an infinite loop during decompression.