Public Date:
718152: CVE-2011-2517 kernel: nl80211: missing check for valid SSID size in scan operations

The MITRE CVE dictionary describes this issue as:

Multiple buffer overflows in net/wireless/nl80211.c in the Linux kernel before allow local users to gain privileges by leveraging the CAP_NET_ADMIN capability during scan operations with a long SSID value.

Find out more about CVE-2011-2517 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not provide support for the Linux wireless LAN (802.11) configuration API. This has been addressed in Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG via,, and

CVSS v2 metrics

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

Base Score 6.6
Base Metrics AV:L/AC:M/Au:S/C:C/I:C/A:C
Access Vector Local
Access Complexity Medium
Authentication Single
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-2011:1212 2011-09-06
Red Hat Enterprise Linux EUS (v. 5.6 server) (kernel) RHSA-2011:1813 2011-12-13
Red Hat Enterprise Linux version 6 (kernel) RHSA-2011:1189 2011-08-23
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2011:1253 2011-09-12

Affected Packages State

Platform Package State
Red Hat Enterprise Linux EUS (v. 5.6 server) kernel Affected
Red Hat Enterprise Linux 4 kernel Not affected