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Red Hat OpenShift: CVE-2019-19602: kernel: cached use of fpu_fpregs_owner_ctx in arch/x86/include/asm/fpu/internal.h can lead to DoS

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Red Hat OpenShift: CVE-2019-19602: kernel: cached use of fpu_fpregs_owner_ctx in arch/x86/include/asm/fpu/internal.h can lead to DoS

Severity
5
CVSS
(AV:L/AC:M/Au:N/C:C/I:N/A:P)
Published
12/05/2019
Created
03/13/2021
Added
03/12/2021
Modified
03/12/2021

Description

fpregs_state_valid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact because of incorrect fpu_fpregs_owner_ctx caching, as demonstrated by mishandling of signal-based non-cooperative preemption in Go 1.14 prereleases on amd64, aka CID-59c4bd853abc.

Solution(s)

  • linuxrpm-upgrade-redhat-coreos

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