The ia64 Linux Kernel contains a flaw that may lead to an unauthorized information disclosure. The issue is triggered when a floating point leak occurs, which will disclose the registers of other process information resulting in a loss of confidentiality.
Classification
Location:
Local Access Required
Attack Type:
Information Disclosure,
Other
Impact:
Loss of Confidentiality
Exploit:
Exploit Public
Disclosure:
OSVDB Verified
Technical
The context switch code only checks the psr.mfh bit and does not look at who the own the FPH. This allows an attacker to set the MFH bit and look at the registers of another sensitive process.
Solution
Upgrade to version 2.4.26 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing applicable patches from your respective Linux vendor.
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