CVE-2016-6833
MEDIUMCVSS 4.4/10EPSS 0.39%
Last modified
CVE-2016-6833 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Qemu | Qemu | <= 2.6.2 | — |
| Qemu | Qemu | 2.7.0 | Rc0 |
| Debian | Debian Linux | 8.0 | — |
References
- http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/93255Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/93255Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing List, Third Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-6833?
Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.
How severe is CVE-2016-6833?
CVE-2016-6833 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2016-6833?
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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