--- title: "CVE-2012-2119\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-2012-2119?format=md keywords: index, follow --- # CVE-2012-2119 Publication date 19 April 2012 Last updated 4 July 2026 --- Ubuntu priority **Low** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Buffer overflow in the macvtap device driver in the Linux kernel before 3.4.5, when running in certain configurations, allows privileged KVM guest users to cause a denial of service (crash) via a long descriptor with a long vector length. ### From the Ubuntu Security Team A flaw was discovered in the Linux kernel's macvtap device driver, which is used in KVM (Kernel-based Virtual Machine) to create a network bridge between host and guest. A privleged user in a guest could exploit this flaw to crash the host, if the vhost\_net module is loaded with the experimental\_zcopytx option enabled. [Read the notes from the security team](https://ubuntu.com/security/CVE-2012-2119?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 12.04 LTS precise | Not affected | | 11.10 oneiric | Not affected | | 11.04 natty | Not affected | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not affected | | linux-armadaxp | 12.04 LTS precise | Fixed 3.2.0-1606.9 | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not in release | | 8.04 LTS hardy | Not in release | | linux-ec2 | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not in release | | linux-fsl-imx51 | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not in release | | linux-lts-backport-maverick | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Ignored end of life | | 8.04 LTS hardy | Not in release | | linux-lts-backport-natty | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not in release | | linux-lts-backport-oneiric | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Not affected | | 8.04 LTS hardy | Not in release | | linux-mvl-dove | 12.04 LTS precise | Not in release | | 11.10 oneiric | Not in release | | 11.04 natty | Not in release | | 10.04 LTS lucid | Ignored end of life | | 8.04 LTS hardy | Not in release | | linux-ti-omap4 | 12.04 LTS precise | Not affected | | 11.10 oneiric | Not affected | | 11.04 natty | Not affected | | 10.04 LTS lucid | Not in release | | 8.04 LTS hardy | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2012-2119?format=md#patch-details) ## Notes --- ### [apw](https://launchpad.net/~apw) email thread discussing the patch does not conclude on a patch as yet nothing obviously matching it has hit mainline yet a second patch set was pushed under the thread below and appears to be making its way into v3.5 http://www.spinics.net/lists/netdev/msg197132.html Patch set seems to have hit ending at the sha1 below, it is possible we need all four patches: b92946e2919134ebe2a4083e4302236295ea2a73 ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | linux | * Introduced by [97bc363](https://git.kernel.org/linus/97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2), fixed by [3afc962](https://git.kernel.org/linus/3afc9621f15701c557e60f61eba9242bac2771dd) * Introduced by [97bc363](https://git.kernel.org/linus/97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2), fixed by [4ef67eb](https://git.kernel.org/linus/4ef67ebedffa44ed9939b34708ac2fee06d2f65f) * Introduced by [97bc363](https://git.kernel.org/linus/97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2), fixed by [02ce04b](https://git.kernel.org/linus/02ce04bb3d28c3333231f43bca677228dbc686fe) * Introduced by [97bc363](https://git.kernel.org/linus/97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2), fixed by [01d6657](https://git.kernel.org/linus/01d6657b388438def19c8baaea28e742b6ed32ec) * Introduced by [97bc363](https://git.kernel.org/linus/97bc3633bec7ed0fdfbda6b9cf86c51e4f58f8e2), fixed by [b92946e](https://git.kernel.org/linus/b92946e2919134ebe2a4083e4302236295ea2a73) | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2119) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-2119) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-2119) * [Debian](https://security-tracker.debian.org/tracker/CVE-2012-2119) ### Related Ubuntu Security Notices (USN) + [USN-1529-1](https://usn.ubuntu.com/USN-1529-1) + Linux kernel vulnerabilities + 10 August 2012 + [USN-1514-1](https://usn.ubuntu.com/USN-1514-1) + Linux kernel (OMAP4) vulnerabilities + 10 August 2012 ### Other references * * * *