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>> Linux Kernel AMD K7/K8 CPU x87 Register Local Information Leak Vulnerability

Title : Linux Kernel AMD K7/K8 CPU x87 Register Local Information Leak Vulnerability
VUPEN ID : VUPEN/ADV-2006-1426
CVE ID : CVE-2006-1056
Rated as : Low Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2006-04-19


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in Linux Kernel, which could be exploited by local attackers to disclose sensitive information. This flaw is due to an error where AMD K7/K8 CPUs only saving/restoring the FOP/FIP/FDP x87 registers in FXSAVE when an exception is pending, which could cause x87 instruction information to be leaked between processes.

Affected Products

Linux Kernel version 2.6.16.8 and prior

Solution

Upgrade to Linux Kernel version 2.6.16.9 :
http://www.kernel.org/

References

http://www.vupen.com/english/advisories/2006/1426
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.9

Credits

Vulnerability reported by Jan Beulich

ChangeLog

2006-04-19 : Initial release

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