Vulnerability in Xen
CVE-2016-5242
The p2m_teardown function in arch/arm/p2m.c in Xen 4.4.x through 4.6.x allows local guest OS users with access to the driver domain to cause a denial of service (NULL pointer dereference and host OS crash) by creating concurrent domains and holding references to them, related to VMID exhaustion.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (25.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Xen — versions 4.4.0, 4.4.1, 4.4.2
References
- www.securityfocus.com/bid/91015 (vdb-entry)
- xenbits.xen.org/xsa/advisory-181.html (Vendor Advisory)
- www.securitytracker.com/id/1036035 (vdb-entry)
- www.debian.org/security/2016/dsa-3633 (vendor-advisory)
Frequently asked questions
- What is CVE-2016-5242?
- CVE-2016-5242 is a medium-severity vulnerability in Xen. CVSS score: 5.6/10. Published 2016-06-07.
- How severe is CVE-2016-5242?
- Medium severity. CVSS v3 base score is 5.6 out of 10.