CVE-2016-9381
HIGHCVSS 7.5/10EPSS 0.29%
Last modified
CVE-2016-9381 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
Metrics
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Qemu | Qemu | <= 2.7.1 | — |
| Qemu | Qemu | 2.8.0 | Rc0 |
| Citrix | Xenserver | 6.0.2 | — |
| Citrix | Xenserver | 6.2.0 | — |
| Citrix | Xenserver | 6.5 | — |
| Citrix | Xenserver | 7.0 | — |
References
- http://www.securityfocus.com/bid/94476Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037344Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-197.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201612-56Third Party Advisory
- https://support.citrix.com/article/CTX218775Third Party Advisory
- http://www.securityfocus.com/bid/94476Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037344Third Party Advisory, VDB Entry
- http://xenbits.xen.org/xsa/advisory-197.htmlThird Party Advisory
- https://security.gentoo.org/glsa/201612-56Third Party Advisory
- https://support.citrix.com/article/CTX218775Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-9381?
Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
How severe is CVE-2016-9381?
CVE-2016-9381 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2016-9381?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2016-9381?
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Scan your code nowSource: NVD / NIST