The Linux kernel before 3.4.5 on the x86 platform, when Physical Address Extension (PAE) is enabled, does not properly use the Page Middle Directory (PMD), which allows local users to cause a denial of service (panic) via a crafted application that triggers a race condition.
Exploitability
AV:LAC:HAu:NImpact
C:NI:NA:C4/AV:L/AC:H/Au:N/C:N/I:N/A:C