Race condition in Comodo Internet Security before 4.1.149672.916 on Windows XP allows local users to bypass kernel-mode hook handlers, and execute dangerous code that would otherwise be blocked by a handler but not blocked by signature-based malware detection, via certain user-space memory changes during hook-handler execution, aka an argument-switch attack or a KHOBE attack.

Multiple race conditions in Comodo Internet Security before 5.8.213334.2131 allow local users to bypass the Defense+ feature via unspecified vectors.

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not properly check whether unspecified X.509 certificates are revoked, which has unknown impact and remote attack vectors.

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 allows remote attackers to cause a denial of service (application crash) via a crafted compressed file.

The Antivirus component in Comodo Internet Security before 5.4.189822.1355 allows remote attackers to cause a denial of service (application crash) via a crafted .PST file.

Multiple race conditions in Comodo Internet Security before 5.8.211697.2124 allow local users to bypass the Defense+ feature via unspecified vectors.

Comodo Internet Security before 5.10.228257.2253 on Windows 7 x64 allows local users to cause a denial of service (system crash) via a crafted 32-bit Portable Executable (PE) file with a kernel ImageBase value.