Unrated severityNVD Advisory· Published Jul 20, 2009· Updated Jun 16, 2026
CVE-2009-1897
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc4:x86_32:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:*
- (no CPE)range: 2.6.30, 2.6.30.1
Patches
Vulnerability mechanics
References
13- grsecurity.net/~spender/cheddar_bay.tgznvdPatch
- www.vupen.com/english/advisories/2009/1925nvdPatchVendor Advisory
- isc.sans.org/diary.htmlnvdExploit
- lkml.org/lkml/2009/7/6/19nvdExploit
- secunia.com/advisories/35839nvdVendor Advisory
- archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.htmlnvd
- archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.htmlnvd
- article.gmane.org/gmane.linux.network/124939nvd
- git.kernel.orgnvd
- www.openwall.com/lists/oss-security/2009/07/17/1nvd
- bugzilla.redhat.com/show_bug.cginvd
- exchange.xforce.ibmcloud.com/vulnerabilities/51803nvd
- www.redhat.com/en/blog/security-flaws-caused-compiler-optimizationsnvd
News mentions
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