UBUNTU-CVE-2015-7835

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Source
https://ubuntu.com/security/CVE-2015-7835
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-7835.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2015-7835
Upstream
Published
2015-10-30T15:59:00Z
Modified
2025-09-08T16:43:28Z
Severity
  • Ubuntu - medium
Summary
[none]
Details

The modl2entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.

References

Affected packages

Ubuntu:14.04:LTS / xen

Package

Name
xen
Purl
pkg:deb/ubuntu/xen@4.4.2-0ubuntu0.14.04.3?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.4.2-0ubuntu0.14.04.3

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

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libxen-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "libxen-dev",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "libxen-ocaml",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "libxen-ocaml-dev",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "libxenstore3.0",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.1-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.3-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.3-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.4-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.4-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-hypervisor-4.4-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-system-amd64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-system-arm64",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-system-armhf",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-utils-4.4",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xen-utils-common",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        },
        {
            "binary_name": "xenstore-utils",
            "binary_version": "4.4.2-0ubuntu0.14.04.3"
        }
    ]
}