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CVE-2009-1897 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html	CVE
http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html	CVE
http://article.gmane.org/gmane.linux.network/124939	CVE
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13	CVE
http://grsecurity.net/~spender/cheddar_bay.tgz	CVE	Patch
http://isc.sans.org/diary.html?storyid=6820	CVE	Exploit
http://lkml.org/lkml/2009/7/6/19	CVE	Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=512284	CVE
http://secunia.com/advisories/35839	CVE	Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/51803	CVE
https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations	CVE
http://www.openwall.com/lists/oss-security/2009/07/17/1	CVE
http://www.vupen.com/english/advisories/2009/1925	CVE	PatchVendor Advisory
http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0241.html	[email protected]
http://archives.neohapsis.com/archives/fulldisclosure/2009-07/0246.html	[email protected]
http://article.gmane.org/gmane.linux.network/124939	[email protected]
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=3c8a9c63d5fd738c261bd0ceece04d9c8357ca13	[email protected]
http://grsecurity.net/~spender/cheddar_bay.tgz	[email protected]	Patch
http://isc.sans.org/diary.html?storyid=6820	[email protected]	Exploit
http://lkml.org/lkml/2009/7/6/19	[email protected]	Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=512284	[email protected]
http://secunia.com/advisories/35839	[email protected]	Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/51803	[email protected]
https://www.redhat.com/en/blog/security-flaws-caused-compiler-optimizations	[email protected]
http://www.openwall.com/lists/oss-security/2009/07/17/1	[email protected]
http://www.vupen.com/english/advisories/2009/1925	[email protected]	PatchVendor Advisory

see all 26 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer	[email protected]

Affected Products

Product	Versions
linux linux kernel	2.6.30 2.6.30 rc1 2.6.30 rc2 2.6.30 rc3 2.6.30 rc4
CPE cpe:2.3:o:linux:linux_kernel:2.6.30:::::::* 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:::::: cpe:2.3:o:linux:linux_kernel:2.6.30.1:::::::* Remediation No remediation found in references.

Product

Versions

linux linux kernel

2.6.30

2.6.30 rc1

2.6.30 rc2

2.6.30 rc3

2.6.30 rc4

CPE

cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:*
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:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 16, 2026	CVE Modified	[email protected]
Apr 23, 2026	Status Change	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 13, 2023	CVE Modified	[email protected]
Aug 21, 2019	CVE Modified	[email protected]
Aug 17, 2017	CVE Modified	[email protected]
Jul 20, 2009	Initial Analysis	[email protected]