--- title: "CVE-2009-1897\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-2009-1897?format=md keywords: index, follow --- # CVE-2009-1897 Publication date 20 July 2009 Last updated 24 July 2024 --- Ubuntu priority **High** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description The tun\_chr\_poll function in drivers/net/tun.c in the tun subsystem in the Linux kernel 2.6.30 and 2.6.30.1, when the -fno-delete-null-pointer-checks gcc option is omitted, allows local users to gain privileges via vectors involving a NULL pointer dereference and an mmap of /dev/net/tun, a different vulnerability than CVE-2009-1894. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 9.04 jaunty | Not affected | | 8.10 intrepid | Not affected | | 8.04 LTS hardy | Not affected | | 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-2009-1897) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-1897) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-1897) * [Debian](https://security-tracker.debian.org/tracker/CVE-2009-1897) ### Other references *