Improper input validation in Xen
CVE-2016-3961
Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Xen
- Canonical Ubuntu Linux — versions 14.04, 15.10, 16.04
Weakness classification (CWE)
References
- xenbits.xen.org/xsa/xsa174.patch (Patch)
- www.ubuntu.com/usn/USN-3006-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-3004-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-3001-1 (vendor-advisory, Third Party Advisory)
- xenbits.xen.org/xsa/advisory-174.html (Vendor Advisory)
- www.ubuntu.com/usn/USN-3005-1 (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1035569 (VDB Entry, Third Party Advisory, vdb-entry)
- www.ubuntu.com/usn/USN-3049-1 (vendor-advisory)
- www.debian.org/security/2016/dsa-3607 (vendor-advisory)
- www.ubuntu.com/usn/USN-3002-1 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-3961?
- CVE-2016-3961 is a medium-severity vulnerability in Xen, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2016-04-15.
- How severe is CVE-2016-3961?
- Medium severity. CVSS v3 base score is 5.5 out of 10.