UBUNTU-CVE-2016-9921

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Source
https://ubuntu.com/security/CVE-2016-9921
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-9921.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2016-9921
Upstream
Downstream
Related
Published
2016-12-23T00:00:00Z
Modified
2025-09-08T16:43:57Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVSS Calculator
  • 6.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS.

References

Affected packages

Ubuntu:14.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@2.0.0+dfsg-2ubuntu1.33?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.0+dfsg-2ubuntu1.33

Affected versions

1.*

1.5.0+dfsg-3ubuntu5
1.5.0+dfsg-3ubuntu6
1.6.0+dfsg-2ubuntu1
1.6.0+dfsg-2ubuntu2
1.6.0+dfsg-2ubuntu3
1.6.0+dfsg-2ubuntu4
1.7.0+dfsg-2ubuntu1
1.7.0+dfsg-2ubuntu2
1.7.0+dfsg-2ubuntu3
1.7.0+dfsg-2ubuntu4
1.7.0+dfsg-2ubuntu5
1.7.0+dfsg-2ubuntu7
1.7.0+dfsg-2ubuntu8
1.7.0+dfsg-2ubuntu9
1.7.0+dfsg-3ubuntu1~ppa1
1.7.0+dfsg-3ubuntu1
1.7.0+dfsg-3ubuntu2
1.7.0+dfsg-3ubuntu3
1.7.0+dfsg-3ubuntu4
1.7.0+dfsg-3ubuntu5
1.7.0+dfsg-3ubuntu6
1.7.0+dfsg-3ubuntu7

2.*

2.0.0~rc1+dfsg-0ubuntu1
2.0.0~rc1+dfsg-0ubuntu2
2.0.0~rc1+dfsg-0ubuntu3
2.0.0~rc1+dfsg-0ubuntu3.1
2.0.0+dfsg-2ubuntu1
2.0.0+dfsg-2ubuntu1.1
2.0.0+dfsg-2ubuntu1.2
2.0.0+dfsg-2ubuntu1.3
2.0.0+dfsg-2ubuntu1.5
2.0.0+dfsg-2ubuntu1.6
2.0.0+dfsg-2ubuntu1.7
2.0.0+dfsg-2ubuntu1.8
2.0.0+dfsg-2ubuntu1.9
2.0.0+dfsg-2ubuntu1.10
2.0.0+dfsg-2ubuntu1.11
2.0.0+dfsg-2ubuntu1.13
2.0.0+dfsg-2ubuntu1.14
2.0.0+dfsg-2ubuntu1.15
2.0.0+dfsg-2ubuntu1.16
2.0.0+dfsg-2ubuntu1.17
2.0.0+dfsg-2ubuntu1.18
2.0.0+dfsg-2ubuntu1.19
2.0.0+dfsg-2ubuntu1.20
2.0.0+dfsg-2ubuntu1.21
2.0.0+dfsg-2ubuntu1.22
2.0.0+dfsg-2ubuntu1.24
2.0.0+dfsg-2ubuntu1.25
2.0.0+dfsg-2ubuntu1.26
2.0.0+dfsg-2ubuntu1.27
2.0.0+dfsg-2ubuntu1.28
2.0.0+dfsg-2ubuntu1.29
2.0.0+dfsg-2ubuntu1.30
2.0.0+dfsg-2ubuntu1.31
2.0.0+dfsg-2ubuntu1.32

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-common"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-keymaps"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-kvm"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-aarch64"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "2.0.0+dfsg-2ubuntu1.33",
            "binary_name": "qemu-utils"
        }
    ]
}

Ubuntu:16.04:LTS / qemu

Package

Name
qemu
Purl
pkg:deb/ubuntu/qemu@1:2.5+dfsg-5ubuntu10.11?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:2.5+dfsg-5ubuntu10.11

Affected versions

1:2.*

1:2.3+dfsg-5ubuntu9
1:2.3+dfsg-5ubuntu10
1:2.4+dfsg-4ubuntu1
1:2.4+dfsg-4ubuntu2
1:2.4+dfsg-4ubuntu3
1:2.4+dfsg-5ubuntu3
1:2.5+dfsg-1ubuntu2
1:2.5+dfsg-1ubuntu3
1:2.5+dfsg-1ubuntu4
1:2.5+dfsg-1ubuntu5
1:2.5+dfsg-5ubuntu1
1:2.5+dfsg-5ubuntu2
1:2.5+dfsg-5ubuntu4
1:2.5+dfsg-5ubuntu6
1:2.5+dfsg-5ubuntu7
1:2.5+dfsg-5ubuntu10
1:2.5+dfsg-5ubuntu10.1
1:2.5+dfsg-5ubuntu10.2
1:2.5+dfsg-5ubuntu10.3
1:2.5+dfsg-5ubuntu10.4
1:2.5+dfsg-5ubuntu10.5
1:2.5+dfsg-5ubuntu10.6
1:2.5+dfsg-5ubuntu10.7
1:2.5+dfsg-5ubuntu10.8
1:2.5+dfsg-5ubuntu10.9
1:2.5+dfsg-5ubuntu10.10

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-block-extra"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-guest-agent"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-kvm"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-aarch64"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-arm"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-common"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-mips"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-misc"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-ppc"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-s390x"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-sparc"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-system-x86"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-user"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-user-binfmt"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-user-static"
        },
        {
            "binary_version": "1:2.5+dfsg-5ubuntu10.11",
            "binary_name": "qemu-utils"
        }
    ]
}