kernel: cachestat: fix page cache statistics permission checking

In the Linux kernel, the following vulnerability has been resolved: cachestat: fix page cache statistics permission checking When the 'cachestat' system call was added in commit cf264e1329fb "cachestat: implement cachestat syscall", it was meant to be a much more convenient and performant version...

DEBIAN-CVE-2017-14319

A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence ...