Use After Free in Xen
CVE-2016-7154
Use-after-free vulnerability in the FIFO event channel code in Xen 4.4.x allows local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% 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 — versions 4.4.0, 4.4.1, 4.4.2
Weakness classification (CWE)
References
- www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- www.securityfocus.com/bid/92863 (VDB Entry, Third Party Advisory, vdb-entry)
- xenbits.xen.org/xsa/advisory-188.html (Patch, Vendor Advisory)
- www.debian.org/security/2016/dsa-3663 (vendor-advisory)
- xenbits.xen.org/xsa/xsa188.patch (Patch)
- www.c7zero.info/stuff/csw2017_ExploringYourSystemDeeper_updated.pdf
- support.citrix.com/article/CTX216071 (Third Party Advisory)
- www.securitytracker.com/id/1036754 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-7154?
- CVE-2016-7154 is a medium-severity vulnerability in Xen, classified under Use After Free. CVSS score: 6.7/10. Published 2016-09-21.
- How severe is CVE-2016-7154?
- Medium severity. CVSS v3 base score is 6.7 out of 10.