--- title: "CVE-2009-0029\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-2009-0029?format=md keywords: index, follow --- # CVE-2009-0029 Publication date 15 January 2009 Last updated 4 July 2026 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The ABI in the Linux kernel 2.6.28 and earlier on s390, powerpc, sparc64, and mips 64-bit platforms requires that a 32-bit argument in a 64-bit register was properly sign extended when sent from a user-mode application, but cannot verify this, which allows local users to cause a denial of service (crash) or possibly gain privileges via a crafted system call. ### From the Ubuntu Security Team The 64-bit syscall interfaces did not correctly handle sign extension. A local attacker could make malicious syscalls, possibly gaining root privileges. The x86\_64 architecture was not affected. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 8.10 intrepid | Ignored | | 8.04 LTS hardy | Ignored | | 7.10 gutsy | Not in release | | 6.06 LTS dapper | Not in release | | linux-source-2.6.15 | 8.10 intrepid | Not in release | | 8.04 LTS hardy | Not in release | | 7.10 gutsy | Not in release | | 6.06 LTS dapper | Fixed 2.6.15-54.76 | | linux-source-2.6.22 | 8.10 intrepid | Not in release | | 8.04 LTS hardy | Not in release | | 7.10 gutsy | Ignored | | 6.06 LTS dapper | 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-2009-0029?format=md#patch-details) ### 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 [1da177e](https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2), fixed by [bca2685](https://git.kernel.org/linus/bca268565fd18f0b36ab8fff6e1623d8dffae2b1) | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0029) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-0029) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-0029) * [Debian](https://security-tracker.debian.org/tracker/CVE-2009-0029) ### Related Ubuntu Security Notices (USN) + [USN-752-1](https://usn.ubuntu.com/USN-752-1) + Linux kernel vulnerabilities + 7 April 2009 ### Other references * * *