CVE ID:	CVE-2009-1897
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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2009-1897 20090716 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html 20090716 Re: Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html 35839 http://secunia.com/advisories/35839 ADV-2009-1925 http://www.vupen.com/english/advisories/2009/1925 [linux-kernel] 20090706 Re: PROBLEM: tun/tap crashes if open() /dev/net/tun and then poll() it. http://lkml.org/lkml/2009/7/6/19 [netdev] 20090409 Oops in tun: bisected to Limit amount of queued packets per device http://article.gmane.org/gmane.linux.network/124939 [oss-security] 20090717 Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable http://www.openwall.com/lists/oss-security/2009/07/17/1 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13 http://grsecurity.net/~spender/cheddar_bay.tgz http://grsecurity.net/~spender/cheddar_bay.tgz http://isc.sans.org/diary.html?storyid=6820 http://isc.sans.org/diary.html?storyid=6820 https://bugzilla.redhat.com/show_bug.cgi?id=512284 https://bugzilla.redhat.com/show_bug.cgi?id=512284 https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations linux-kernel-tunchrpoll-code-execution(51803) https://exchange.xforce.ibmcloud.com/vulnerabilities/51803