Vulnerability CVE-2015-7513
Published: 2016-02-07   Modified: 2016-02-08

Description:
arch/x86/kvm/x86.c in the Linux kernel before 4.4 does not reset the PIT counter values during state restoration, which allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via a zero value, related to the kvm_vm_ioctl_set_pit and kvm_vm_ioctl_set_pit2 functions.

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
6.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Linux kernel 

 References:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0185604c2d82c560dab2f2933a18f797e74ab5a8
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175792.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176194.html
http://www.debian.org/security/2016/dsa-3434
http://www.openwall.com/lists/oss-security/2016/01/07/2
http://www.securityfocus.com/bid/79901
http://www.securitytracker.com/id/1034602
http://www.ubuntu.com/usn/USN-2886-1
http://www.ubuntu.com/usn/USN-2887-1
http://www.ubuntu.com/usn/USN-2887-2
http://www.ubuntu.com/usn/USN-2888-1
http://www.ubuntu.com/usn/USN-2889-1
http://www.ubuntu.com/usn/USN-2889-2
http://www.ubuntu.com/usn/USN-2890-1
http://www.ubuntu.com/usn/USN-2890-2
http://www.ubuntu.com/usn/USN-2890-3
https://bugzilla.redhat.com/show_bug.cgi?id=1284847
https://github.com/torvalds/linux/commit/0185604c2d82c560dab2f2933a18f797e74ab5a8
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