--- title: "CVE-2014-7155\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2014-7155?format=md keywords: index, follow --- # CVE-2014-7155 Publication date 2 October 2014 Last updated 24 July 2024 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The x86\_emulate function in arch/x86/x86\_emulate/x86\_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction. [Read the notes from the security team](https://ubuntu.com/security/CVE-2014-7155?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | xen | 15.04 vivid | Fixed 4.4.1-3ubuntu1 | | 14.10 utopic | Fixed 4.4.0-0ubuntu8 | | 14.04 LTS trusty | Fixed 4.4.0-0ubuntu5.2 | | 12.04 LTS precise | Fixed 4.1.6.1-0ubuntu0.12.04.3 | | 10.04 LTS lucid | Not in release | | xen-3.3 | 15.04 vivid | Not in release | | 14.10 utopic | Not in release | | 14.04 LTS trusty | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Ignored end of life | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Notes --- ### [mdeslaur](https://launchpad.net/~mdeslaur) 3.2.x+ ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7155) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-7155) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-7155) * [Debian](https://security-tracker.debian.org/tracker/CVE-2014-7155) ### Other references * *