5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.9 Medium
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
27.1%
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.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d974baa398f34393db76be45f7d4d04fbdbb4a0a
lists.opensuse.org/opensuse-security-announce/2015-01/msg00035.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00010.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
rhn.redhat.com/errata/RHSA-2015-0290.html
rhn.redhat.com/errata/RHSA-2015-0782.html
rhn.redhat.com/errata/RHSA-2015-0864.html
secunia.com/advisories/60174
www.debian.org/security/2014/dsa-3060
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.2
www.mandriva.com/security/advisories?name=MDVSA-2015:058
www.openwall.com/lists/oss-security/2014/10/21/4
www.openwall.com/lists/oss-security/2014/10/29/7
www.securityfocus.com/bid/70691
www.ubuntu.com/usn/USN-2417-1
www.ubuntu.com/usn/USN-2418-1
www.ubuntu.com/usn/USN-2419-1
www.ubuntu.com/usn/USN-2420-1
www.ubuntu.com/usn/USN-2421-1
bugzilla.redhat.com/show_bug.cgi?id=1153322
github.com/torvalds/linux/commit/d974baa398f34393db76be45f7d4d04fbdbb4a0a
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.9 Medium
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.001 Low
EPSS
Percentile
27.1%