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Red Hat OpenShift: CVE-2019-15031: kernel: powerpc: local user can read vector registers of other users' processes via an interrupt

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Red Hat OpenShift: CVE-2019-15031: kernel: powerpc: local user can read vector registers of other users' processes via an interrupt

Severity
4
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:P)
Published
09/13/2019
Created
12/30/2020
Added
12/29/2020
Modified
05/10/2023

Description

In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via an interrupt. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process, because MSR_TM_ACTIVE is misused in arch/powerpc/kernel/process.c.

Solution(s)

  • linuxrpm-upgrade-redhat-coreos

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