CVE-2016-6833: n/a vulnerability

CVE-2016-6833: Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick E...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:43 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-6833 is a QEMU availability flaw. A privileged administrator inside a guest VM could crash that VM's QEMU process through the vmxnet3 network device path. The sources describe denial of service, not data theft or host escape. Exposure is most relevant to environments running QEMU with the vmxnet3 emulated network device enabled for guest VMs. Systems not using QEMU, or not exposing vmxnet3 to guests, are less likely to be affected based on the provided sources. Treat this as a patching priority for virtualization platforms hosting untrusted or customer-controlled VMs. Business impact is mainly VM availability and service reliability, not confirmed data compromise. Mitigation focus: Apply vendor QEMU security updates from your Linux distribution or virtualization platform.; Prioritize hosts offering vmxnet3 devices to untrusted or tenant-controlled guests.; Check vendor advisories for exact fixed package versions before deployment..

Prepared: Jun 13, 2026, 13:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 10, 2016, 00:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
[debian-lts-announce] 20180906 [SECURITY] [DLA 1497-1] qemu security updateCVE reference · mailing-list, x_refsource_MLIST
[qemu-devel] 20160809 [PULL 2/3] net: vmxnet3: check for device_active before writeCVE reference · mailing-list, x_refsource_MLIST
GLSA-201609-01CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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