Public Date:
CWE-456 -> CWE-476
516949: CVE-2009-2692 kernel: uninit op in SOCKOPS_WRAP() leads to privesc

The MITRE CVE dictionary describes this issue as:

The Linux kernel 2.6.0 through, and 2.4.4 through, 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.

Find out more about CVE-2009-2692 from the MITRE CVE dictionary dictionary and NIST NVD.


Red Hat is aware of this issue. Please see Updates for Red Hat Enterprise Linux 3, 4, 5, and Red Hat Enterprise MRG to correct this issue are available:

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 7.2
Base Metrics AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 5 (kernel) RHSA-2009:1222 2009-08-24
Red Hat Enterprise Linux version 3 (kernel) RHSA-2009:1233 2009-08-27
Red Hat Enterprise Linux EUS (v. 5.2 server) (kernel) RHSA-2009:1457 2009-09-22
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2009:1239 2009-09-01
Red Hat Enterprise Linux version 4 (kernel) RHSA-2009:1223 2009-08-24
Red Hat Enterprise Linux ES EUS (v. 4.7) (kernel) RHSA-2009:1469 2009-09-30


Red Hat would like to thank Tavis Ormandy and Julien Tinnes of the Google Security Team for responsibly reporting this flaw.