The 64 bit ELF support in Linux kernel 2.6 before 2.6.10, on 64-bit architectures, does not properly check for overlapping VMA (virtual memory address) allocations, which allows local users to cause a denial of service (system crash) or execute arbitrary code via a crafted ELF or a.out file.
Vulnerability in Mandrake Linux usermode package allows local users to to reboot or halt the system.
Insecure permissions for the /proc/scsi/qla2300/HbaApiNode file in Linux allows local users to cause a denial of service.