Linux kernel vulnerabilities

Releases

• Ubuntu 5.04
• Ubuntu 4.10

Details

Alexander Nyberg discovered that ptrace() insufficiently validated
addresses on the amd64 platform so that it was possible to set an
invalid segment base. A local attacker could exploit this to crash the
kernel. This does not affect the i386 and powerpc platforms in any
way. (CAN-2005-0756)

Chris Wright discovered that the mmap() function could create illegal
memory maps (using the “mmap” function) with the start address
pointing beyond the end address. A local user could exploit this to
crash the kernel or possibly even execute arbitrary code with kernel
privileges. (CAN-2005-1265)