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Vulnerability record · CVE-2009-2692 · published 14 August 2009

CVE-2009-2692: Linux kernel use of uninitialized resource vulnerability

Linux · Linux Kernel

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

7.8 CVSS 3.1 High EPSS 15% · top 3.5% CWE-908 · Use of uninitialized resource
7.8CVSS 3.1 base score, v2 7.2
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
78References, 8 tagged exploit
16 Jun 2026Last modified by NVD

Description

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.html Broken LinkExploit
http://blog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.html ExploitIssue Tracking
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git%3Ba=commit%3Bh=c18d0fe535a73b219f960d1af3d0c264555a1 Broken Link
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e694958388c50148389b0e9b9e9e8945cf0f1b98 Broken Link
http://grsecurity.net/~spender/wunderbar_emporium.tgz Broken Link
http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html Mailing List
http://rhn.redhat.com/errata/RHSA-2009-1222.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2009-1223.html Third Party Advisory
http://secunia.com/advisories/36278 Broken LinkVendor Advisory
http://secunia.com/advisories/36289 Broken LinkVendor Advisory
http://secunia.com/advisories/36327 Broken LinkVendor Advisory
http://secunia.com/advisories/36430 Broken LinkVendor Advisory
http://secunia.com/advisories/37298 Broken LinkVendor Advisory
http://secunia.com/advisories/37471 Broken LinkVendor Advisory
http://support.avaya.com/css/P8/documents/100067254 Third Party Advisory
http://wiki.rpath.com/wiki/Advisories:rPSA-2009-0121 Broken Link
http://www.debian.org/security/2009/dsa-1865 Mailing ListThird Party Advisory
http://www.exploit-db.com/exploits/19933 ExploitThird Party AdvisoryVDB Entry
http://www.exploit-db.com/exploits/9477 Third Party AdvisoryVDB Entry
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.37.5 Broken LinkVendor Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5 Broken LinkVendor Advisory
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.31-rc6 Broken LinkVendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:233 Broken Link
http://www.openwall.com/lists/oss-security/2009/08/14/1 Mailing ListPatch
http://www.redhat.com/support/errata/RHSA-2009-1233.html Broken Link
http://www.securityfocus.com/archive/1/505751/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/505912/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/507985/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/512019/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/36038 Broken LinkExploitThird Party AdvisoryVDB Entry
http://www.vmware.com/security/advisories/VMSA-2009-0016.html Third Party Advisory
http://www.vupen.com/english/advisories/2009/2272 Broken LinkPatchVendor Advisory
http://www.vupen.com/english/advisories/2009/3316 Broken LinkVendor Advisory
http://zenthought.org/content/file/android-root-2009-08-16-source Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=516949 Issue TrackingPatch
https://issues.rpath.com/browse/RPL-3103 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11526 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11591 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8657 Broken Link
http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.html Broken LinkExploit

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Source: NIST National Vulnerability Database (record CVE-2009-2692), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.