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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix) Linux Kernel key_gc_unused_keys() Garbage Collection Bug Lets Local Users Cause Denial of Service Conditions on the Target System
SecurityTracker Alert ID:  1034474
SecurityTracker URL:  http://securitytracker.com/id/1034474
CVE Reference:   CVE-2015-7872   (Links to External Site)
Date:  Dec 17 2015
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 12.04 LTS
Description:   A vulnerability was reported in the Linux kernel. A local user can cause denial of service conditions on the target system.

A local user can supply a specially crafted keyctl command to trigger a garbage collection error in the keyring handler and cause the target system to crash.

The vulnerability resides in the key_gc_unused_keys() function in 'security/keys/gc.c'.

Dmitry Vyukov reported this vulnerability.

Impact:   A local user can cause the target system to crash.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2840-1

Vendor URL:  www.ubuntu.com/usn/usn-2840-1 (Links to External Site)
Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Dec 17 2015 Linux Kernel key_gc_unused_keys() Garbage Collection Bug Lets Local Users Cause Denial of Service Conditions on the Target System



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