--- title: "CVE-2009-2695\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-2009-2695?format=md keywords: index, follow --- # CVE-2009-2695 Publication date 28 August 2009 Last updated 24 July 2024 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The Linux kernel before 2.6.31-rc7 does not properly prevent mmap operations that target page zero and other low memory addresses, which allows local users to gain privileges by exploiting NULL pointer dereference vulnerabilities, related to (1) the default configuration of the allow\_unconfined\_mmap\_low boolean in SELinux on Red Hat Enterprise Linux (RHEL) 5, (2) an error that causes allow\_unconfined\_mmap\_low to be ignored in the unconfined\_t domain, (3) lack of a requirement for the CAP\_SYS\_RAWIO capability for these mmap operations, and (4) interaction between the mmap\_min\_addr protection mechanism and certain application programs. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 9.04 jaunty | Fixed 2.6.28-16.55 | | 8.10 intrepid | Fixed 2.6.27-15.43 | | 8.04 LTS hardy | Fixed 2.6.24-25.63 | | 6.06 LTS dapper | Not in release | | linux-source-2.6.15 | 9.04 jaunty | Not in release | | 8.10 intrepid | Not in release | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not affected | --- * [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-2009-2695) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-2695) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-2695) * [Debian](https://security-tracker.debian.org/tracker/CVE-2009-2695) ### Related Ubuntu Security Notices (USN) + [USN-852-1](https://usn.ubuntu.com/USN-852-1) + Linux kernel vulnerabilities + 22 October 2009 ### Other references *