CVE-2014-8594

Description

The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP).

Category

5.4
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.88% Top 20%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://security.gentoo.org/glsa/201504-04 vendor advisory
http://secunia.com/advisories/62672 third party advisory permissions required
http://xenbits.xen.org/xsa/advisory-109.html patch vendor advisory
http://www.securityfocus.com/bid/71149 vdb entry
http://www.debian.org/security/2015/dsa-3140 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html third party advisory vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/98767 vdb entry

Frequently Asked Questions

What is the severity of CVE-2014-8594?
CVE-2014-8594 has been scored as a medium severity vulnerability.
How to fix CVE-2014-8594?
To fix CVE-2014-8594, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2014-8594 being actively exploited in the wild?
It is possible that CVE-2014-8594 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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