UBUNTU-CVE-2016-4480

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Source
https://ubuntu.com/security/CVE-2016-4480
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-4480.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2016-4480
Upstream
Published
2016-05-18T14:59:00Z
Modified
2025-07-16T08:19:19.383728Z
Severity
  • 8.4 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

The guestwalktables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

References

Affected packages

Ubuntu:14.04:LTS / xen

Package

Name
xen
Purl
pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.6?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.4.2-0ubuntu0.14.04.6

Affected versions

4.*

4.3.0-1ubuntu1
4.3.0-1ubuntu2
4.3.0-1ubuntu3
4.3.0-1ubuntu4
4.3.0-1ubuntu5
4.4.0-0ubuntu3
4.4.0-0ubuntu4
4.4.0-0ubuntu5
4.4.0-0ubuntu5.1
4.4.0-0ubuntu5.2
4.4.1-0ubuntu0.14.04.1
4.4.1-0ubuntu0.14.04.2
4.4.1-0ubuntu0.14.04.3
4.4.1-0ubuntu0.14.04.4
4.4.1-0ubuntu0.14.04.5
4.4.1-0ubuntu0.14.04.6
4.4.2-0ubuntu0.14.04.1
4.4.2-0ubuntu0.14.04.2
4.4.2-0ubuntu0.14.04.3
4.4.2-0ubuntu0.14.04.4
4.4.2-0ubuntu0.14.04.5

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxen-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxen-4.4-dbgsym",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxen-dev",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxen-ocaml",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxen-ocaml-dbgsym",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxen-ocaml-dev",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxenstore3.0",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "libxenstore3.0-dbgsym",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.1-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.3-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.3-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.4-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.4-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-hypervisor-4.4-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-system-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-system-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-system-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-utils-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-utils-4.4-dbgsym",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xen-utils-common",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xenstore-utils",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        },
        {
            "binary_name": "xenstore-utils-dbgsym",
            "binary_version": "4.4.2-0ubuntu0.14.04.6"
        }
    ]
}

Ubuntu:16.04:LTS / xen

Package

Name
xen
Purl
pkg:deb/ubuntu/xen@4.6.0-1ubuntu4.1?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.6.0-1ubuntu4.1

Affected versions

4.*

4.5.1-0ubuntu1
4.5.1-0ubuntu2
4.6.0-1ubuntu1
4.6.0-1ubuntu2
4.6.0-1ubuntu4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxen-4.6",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "libxen-4.6-dbgsym",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "libxen-dev",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "libxenstore3.0",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "libxenstore3.0-dbgsym",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.4-amd64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.4-arm64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.4-armhf",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.5-amd64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.5-arm64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.5-armhf",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.6-amd64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.6-arm64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-hypervisor-4.6-armhf",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-system-amd64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-system-arm64",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-system-armhf",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-utils-4.6",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-utils-4.6-dbgsym",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xen-utils-common",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xenstore-utils",
            "binary_version": "4.6.0-1ubuntu4.1"
        },
        {
            "binary_name": "xenstore-utils-dbgsym",
            "binary_version": "4.6.0-1ubuntu4.1"
        }
    ]
}