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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix) Linux Kernel paravirt_patch_call Indirect Call Processing Lets Local Users View Portions of System Memory for Paravirtualized Guests
SecurityTracker Alert ID:  1041774
SecurityTracker URL:  http://securitytracker.com/id/1041774
CVE Reference:   CVE-2018-15594   (Links to External Site)
Date:  Oct 3 2018
Impact:   Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 16.04 LTS
Description:   A vulnerability was reported in the Linux kernel. A local user can obtain potentially sensitive information from system memory.

The paravirt_patch_call/jump() functions in 'arch/x86/kernel/paravirt.c' do not properly process certain indirect calls. A local user can obtain potentially sensitive information from system memory for a target paravirtualized guest system.

Nadav Amit reported this vulnerability.

Impact:   A local user can obtain potentially sensitive information from system memory for a target paravirtualized guest system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3776-1

Vendor URL:  usn.ubuntu.com/usn/usn-3776-1 (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Sep 5 2018 Linux Kernel paravirt_patch_call Indirect Call Processing Lets Local Users View Portions of System Memory for Paravirtualized Guests



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