I/O port access privilege escalation in x86-64 Linux

ISSUE DESCRIPTION IRET and POPF do not modify EFLAGS.IOPL when executed by code at a privilege level other than zero. Since PV Xen guests run at privilege level 3 for 64-bit ones; 32-bit ones run at privilege level 1, to compensate for this the context switching of EFLAGS.IOPL requires the guest ...

Linux Kernel (x86-64) - Rowhammer Privilege Escalation

Linux Kernel x86-64 - Rowhammer Privilege Escalation Sources: http://googleprojectzero.blogspot.ca/2015/03/exploiting-dram-rowhammer-bug-to-gain.html https://code.google.com/p/google-security-research/issues/detail?id=283 Full PoC:...

dbus -- local dos

Simon McVittie reports: Alexandru Cornea discovered a vulnerability in libdbus caused by an implementation bug in dbusprintfstringupperbound. This vulnerability can be exploited by a local user to crash system services that use libdbus, causing denial of service. It is platform-specific: x86-64...