--- title: "CVE-2006-5173\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-2006-5173?format=md keywords: index, follow --- # CVE-2006-5173 Publication date 17 October 2006 Last updated 17 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux-source-2.6.15 | 7.04 feisty | Not in release | | 6.10 edgy | Not in release | | 6.06 LTS dapper | Fixed 2.6.15-29.58 | | linux-source-2.6.17 | 7.04 feisty | Not in release | | 6.10 edgy | Fixed 2.6.17.1-12.40 | | 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) ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5173) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-5173) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-5173) * [Debian](https://security-tracker.debian.org/tracker/CVE-2006-5173) ### Related Ubuntu Security Notices (USN) + [USN-395-1](https://usn.ubuntu.com/USN-395-1) + Linux kernel vulnerabilities + 14 December 2006 ### Other references *