CVE-2015-8104

high-risk

Published 2015-11-16

The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.

Do I need to act?

0.33% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 10.0/10 Critical

NETWORK / LOW complexity

Affected Products (20)

Xen

Vm Virtualbox

Linux Kernel

Debian Linux

Ubuntu Linux

Xen

Affected Vendors

Linux Xen Oracle Debian Canonical

References (86)

Issue Tracking http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cbdb96...

Mailing List http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172187.h...

Mailing List http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172300.h...

Mailing List http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172435.h...

Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

Mailing List http://lists.opensuse.org/opensuse-updates/2015-12/msg00039.html

Mailing List http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2015-2636.html

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2015-2645.html

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2016-0046.html

Third Party Advisory http://support.citrix.com/article/CTX202583

Third Party Advisory http://support.citrix.com/article/CTX203879

Third Party Advisory http://www.debian.org/security/2015/dsa-3414

Third Party Advisory http://www.debian.org/security/2015/dsa-3426

and 66 more references

/ 100

high-risk

Severity 33/34 · Critical

Exploitability 1/34 · Minimal

Exposure 21/34 · High