RedhatCVELIST:CVE-2009-1897CVE-2009-1897
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.
References
archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html
archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html
article.gmane.org/gmane.linux.network/124939
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13
grsecurity.net/~spender/cheddar_bay.tgz
isc.sans.org/diary.html?storyid=6820
lkml.org/lkml/2009/7/6/19
secunia.com/advisories/35839
www.openwall.com/lists/oss-security/2009/07/17/1
www.vupen.com/english/advisories/2009/1925
bugzilla.redhat.com/show_bug.cgi?id=512284
exchange.xforce.ibmcloud.com/vulnerabilities/51803
www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations
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