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Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)

🗓️ 14 Apr 2020 17:55:22Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

KVM export of the MSR IA32 TSX control to guests leaves the TAA fix incomplete on Cascade Lake CPUs when memory defense is not affected and the Verw clearing mechanism is not used.

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ibm		Security Bulletin: IBM QRadar SIEM is vulnerable to side channel attack with Intel CPUs (CVE-2019-11135)
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ibm		Security Bulletin: IBM Data Risk Manager is affected by multiple vulnerabilities
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ibm		Security Bulletin: Vulnerability in side channel in Intel CPUs affect IBM Cloud Pak System (CVE-2019-11135)
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nessus		Amazon Linux 2 : microcode_ctl / kernel (ALAS-2019-1364)
18 Nov 201900:00
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nessus		Amazon Linux AMI : microcode_ctl / kernel (ALAS-2019-1318)
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nessus		Alibaba Cloud Linux 3 : 0119: virt:rhel and virt-devel:rhel (ALINUX3-SA-2022:0119)
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nessus		AlmaLinux 8 : virt:rhel (ALSA-2020:0279)
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nessus		CentOS 8 : virt:rhel (CESA-2020:0279)
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nessus		CentOS 8 : kernel (CESA-2020:0339)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.6x86_64bpftool0:3.10.0-957.48.1.el7bpftool-0:3.10.0-957.48.1.el7.x86_64.rpm
Red Hat Enterprise Linux7.6ppc64kernel0:3.10.0-957.48.1.el7kernel-0:3.10.0-957.48.1.el7.ppc64.rpm
Red Hat Enterprise Linux7.6ppc64lekernel0:3.10.0-957.48.1.el7kernel-0:3.10.0-957.48.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.6s390xkernel0:3.10.0-957.48.1.el7kernel-0:3.10.0-957.48.1.el7.s390x.rpm
Red Hat Enterprise Linux7.6x86_64kernel0:3.10.0-957.48.1.el7kernel-0:3.10.0-957.48.1.el7.x86_64.rpm
Red Hat Enterprise Linux7.6anykernel-abi-whitelists0:3.10.0-957.48.1.el7.noarchkernel-abi-whitelists-0:3.10.0-957.48.1.el7.noarch.noarch.rpm
Red Hat Enterprise Linux7.6ppc64kernel-bootwrapper0:3.10.0-957.48.1.el7kernel-bootwrapper-0:3.10.0-957.48.1.el7.ppc64.rpm
Red Hat Enterprise Linux7.6ppc64lekernel-bootwrapper0:3.10.0-957.48.1.el7kernel-bootwrapper-0:3.10.0-957.48.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.6ppc64kernel-debug0:3.10.0-957.48.1.el7kernel-debug-0:3.10.0-957.48.1.el7.ppc64.rpm
Red Hat Enterprise Linux7.6ppc64lekernel-debug0:3.10.0-957.48.1.el7kernel-debug-0:3.10.0-957.48.1.el7.ppc64le.rpm
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28 Jun 2026 12:28Current
6.8Medium risk
Vulners AI Score6.8
CVSS 22.1
CVSS 3.16.5
CVSS 35.5
EPSS0.03133
SSVC
CWE-205
kernel virtualizationtransactional synchronization extensionsasynchronous abortcascade lakeverw clearing mechanismcve 2019 11135
5