What’s Vulnerable › Vulnerabilities

CVE-2011-2492

• Severity: low (CVSS 1.9 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-07-28 · updated 2026-06-16
• Weakness: CWE-200

Description

The bluetooth subsystem in the Linux kernel before 3.0-rc4 does not properly initialize certain data structures, which allows local users to obtain potentially sensitive information from kernel memory via a crafted getsockopt system call, related to (1) the l2cap_sock_getsockopt_old function in net/bluetooth/l2cap_sock.c and (2) the rfcomm_sock_getsockopt_old function in net/bluetooth/rfcomm/sock.c.

Affected products

• Linux kernel: before 3.0; 3.0, 3.0-rc1, 3.0-rc2, 3.0-rc3 — fixed in 3.0
• RedHat Enterprise Linux Aus: 5.6
• RedHat Enterprise Linux Desktop: 5.0
• RedHat Enterprise Linux Eus: 5.6
• RedHat Enterprise Linux Server: 5.0
• RedHat Enterprise Linux Workstation: 5.0

How to fix

Upgrade to a fixed version: Linux kernel 3.0. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8d03e971cf403305217b8e62db3a2e5ad2d6263f
• http://marc.info/?l=bugtraq&m=139447903326211&w=2
• http://permalink.gmane.org/gmane.linux.bluez.kernel/12909
• http://rhn.redhat.com/errata/RHSA-2011-0927.html
• http://securitytracker.com/id?1025778
• http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc4
• http://www.openwall.com/lists/oss-security/2011/06/24/2
• http://www.openwall.com/lists/oss-security/2011/06/24/3
• https://bugzilla.redhat.com/show_bug.cgi?id=703019
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8d03e971cf403305217b8e62db3a2e5ad2d6263f
• http://marc.info/?l=bugtraq&m=139447903326211&w=2
• http://permalink.gmane.org/gmane.linux.bluez.kernel/12909

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