[v2.7] kernel: KVM DoS triggerable by malicious host userspace (CVE-2014-3690)
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.17.2 on Intel processors does not ensure that the value in the CR4 control register remains the same after a VM entry, which allows host OS users to kill arbitrary processes or cause a denial of service (system disruption) by leveraging /dev/kvm access, as demonstrated by PR_SET_TSC prctl calls within a modified copy of QEMU.
The fix is here:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d974baa398f34393db76be45f7d4d04fbdbb4a0a
There are no separate patches for 3.14.y and for 3.10.y at the moment.
References:
http://seclists.org/oss-sec/2014/q4/416
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3690
(from redmine: issue id 3536, created on 2014-11-21, closed on 2017-09-05)
- Relations:
- parent #3534