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Bug 505704 (CVE-2014-1438) - Kernel: missing CPU-state sanitation during task-switch causes DOS / privilege escalation (CVE-2014-1438)
Summary: Kernel: missing CPU-state sanitation during task-switch causes DOS / privileg...
Alias: CVE-2014-1438
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
Depends on:
Reported: 2014-03-25 13:28 UTC by Agostino Sarubbo
Modified: 2022-03-25 21:50 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2014-03-25 13:28:39 UTC
CVE-2014-1438 (

The restore_fpu_checking function in arch/x86/include/asm/fpu-internal.h in the Linux kernel before 3.12.8 
on the AMD K7 and K8 platforms does not clear pending exceptions before proceeding to an EMMS instruction, 
which allows local users to cause a denial of service (task kill) or possibly gain privileges via a 
crafted application.