Home/CVE/Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allo
CVE

CVE-2016-6833

Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allo

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.

MEDIUM · CVSS 4.4 EPSS 0.00075
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

3
qemu<= 2.6.2
qemuall versions
debian linuxall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPotentially Suspicious Usage Of Qemu
▣

Scoring & Timeline

4.4
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Dec 2016 · 12:59 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

6
suse-csafSUSE-SU-2016:2781-1
usnUSN-3125-1
suse-csafSUSE-SU-2016:2589-1
suse-csafSUSE-SU-2016:2533-1
suse-csafSUSE-SU-2016:2507-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.qemu.org/?p=qemu.git
http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/93255Third Party AdvisoryVDB Entry
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing ListThird Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing ListPatchThird Party Advisory
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