CVE-2015-5307

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-11-16 · updated 2026-06-17
Weakness: CWE-399

Description

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 #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10
Debian Linux: 7.0, 8.0
Linux kernel: through 4.2.3
Oracle Corporation VM VirtualBox: from 4.0.0 through 4.0.34; from 4.1.0 through 4.1.42; from 4.2.0 through 4.2.34; from 4.3.0 through 4.3.29; from 5.0.0 through 5.0.8
xen: 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.4.0 (+16)

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54a20552e1eae07aa240fa370a0293e006b5faed
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172187.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172300.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172435.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00039.html
http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html

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