high
7
CWE
362 1251
Advisory Published
CVE Published
Updated

CVE-2020-11884: Race Condition

First published: Mon Apr 27 2020(Updated: )

A flaw was found in the Linux kernel on s390 architecture. The issue occurs on multiprocessing systems when one s390 CPU is in Secondary Address Mode and another CPU does a kernel page table upgrade. An inter-processor interrupt (IPI) is then sent to each active CPU to update the control registers with new page table addresses. In Secondary Address Mode the CPU's CR1 register may hold kernel space address to fetch instructions from, but after IPI processing, the same CR1 register is set to point to a user space address. An unprivileged user or process on the system may use this flaw to crash the system or escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel<0:4.18.0-193.1.2.el8_2
0:4.18.0-193.1.2.el8_2
redhat/kernel<0:4.18.0-80.23.2.el8_0
0:4.18.0-80.23.2.el8_0
redhat/kernel<0:4.18.0-147.13.2.el8_1
0:4.18.0-147.13.2.el8_1
redhat/kernel<5.7
5.7
ubuntu/linux<4.15.0-99.100
4.15.0-99.100
ubuntu/linux<5.3.0-51.44
5.3.0-51.44
ubuntu/linux<5.4.0-28.32
5.4.0-28.32
ubuntu/linux<5.7~
5.7~
ubuntu/linux-aws<5.7~
5.7~
ubuntu/linux-aws-5.0<5.7~
5.7~
ubuntu/linux-aws-5.3<5.3.0-1019.21~18.04.1
5.3.0-1019.21~18.04.1
ubuntu/linux-aws-5.3<5.7~
5.7~
ubuntu/linux-aws-hwe<5.7~
5.7~
ubuntu/linux-azure<5.7~
5.7~
ubuntu/linux-azure-4.15<4.15.0-1083.93
4.15.0-1083.93
ubuntu/linux-azure-4.15<5.7~
5.7~
ubuntu/linux-azure-5.3<5.7~
5.7~
ubuntu/linux-azure-5.4<5.7~
5.7~
ubuntu/linux-azure-edge<5.7~
5.7~
ubuntu/linux-gcp<5.7~
5.7~
ubuntu/linux-gcp-4.15<5.7~
5.7~
ubuntu/linux-gcp-5.3<5.7~
5.7~
ubuntu/linux-gcp-edge<5.7~
5.7~
ubuntu/linux-gke-4.15<5.7~
5.7~
ubuntu/linux-gke-5.0<5.7~
5.7~
ubuntu/linux-gke-5.3<5.7~
5.7~
ubuntu/linux-hwe<5.3.0-51.44~18.04.2
5.3.0-51.44~18.04.2
ubuntu/linux-hwe<5.7~
5.7~
ubuntu/linux-hwe<4.15.0-99.100~16.04.1
4.15.0-99.100~16.04.1
ubuntu/linux-hwe-5.4<5.7~
5.7~
ubuntu/linux-hwe-edge<5.7~
5.7~
ubuntu/linux-kvm<5.7~
5.7~
ubuntu/linux-lts-trusty<5.7~
5.7~
ubuntu/linux-lts-xenial<5.7~
5.7~
ubuntu/linux-oem<5.7~
5.7~
ubuntu/linux-oem-5.6<5.7~
5.7~
ubuntu/linux-oem-osp1<5.7~
5.7~
ubuntu/linux-oracle<5.7~
5.7~
ubuntu/linux-oracle-5.0<5.7~
5.7~
ubuntu/linux-oracle-5.3<5.7~
5.7~
ubuntu/linux-raspi<5.7~
5.7~
ubuntu/linux-raspi-5.4<5.7~
5.7~
ubuntu/linux-raspi2<5.7~
5.7~
ubuntu/linux-raspi2-5.3<5.7~
5.7~
ubuntu/linux-riscv<5.7~
5.7~
ubuntu/linux-snapdragon<5.7~
5.7~
Linux Linux kernel>=4.15<4.19.119
Linux Linux kernel>=4.20<5.4.36
Linux Linux kernel>=5.5<5.6.8
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=19.10
Canonical Ubuntu Linux=20.04
Debian Debian Linux=10.0
Fedoraproject Fedora=30
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Netapp Active Iq Unified Manager Vmware Vsphere
Netapp Cloud Backup
Netapp Element Software
Netapp Hci Management Node
Netapp Solidfire
Netapp Steelstore Cloud Integrated Storage
Netapp Solidfire Baseboard Management Controller
All of
Netapp Bootstrap Os
Netapp Hci Compute Node
All of
Netapp A700s Firmware
Netapp A700s
All of
Netapp H300s Firmware
Netapp H300s
All of
Netapp H500s Firmware
Netapp H500s
All of
Netapp H700s Firmware
Netapp H700s
All of
Netapp H300e Firmware
Netapp H300e
All of
Netapp H500e Firmware
Netapp H500e
All of
Netapp H700e Firmware
Netapp H700e
All of
Netapp H410s Firmware
Netapp H410s
All of
Netapp H410c Firmware
Netapp H410c
All of
Netapp H610c Firmware
Netapp H610c
All of
Netapp H610s Firmware
Netapp H610s
Netapp Bootstrap Os
Netapp Hci Compute Node
Netapp A700s Firmware
Netapp A700s
Netapp H300s Firmware
Netapp H300s
Netapp H500s Firmware
Netapp H500s
Netapp H700s Firmware
Netapp H700s
Netapp H300e Firmware
Netapp H300e
Netapp H500e Firmware
Netapp H500e
Netapp H700e Firmware
Netapp H700e
Netapp H410s Firmware
Netapp H410s
Netapp H410c Firmware
Netapp H410c
Netapp H610c Firmware
Netapp H610c
Netapp H610s Firmware
Netapp H610s
debian/linux
4.19.249-2
4.19.304-1
5.10.209-2
5.10.216-1
6.1.76-1
6.1.90-1
6.7.12-1
6.8.9-1

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=215d1f3928713d6eaec67244bcda72105b898000

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f777e19d171670ab558a6d5e6b1ac7f9b6c574f

Remedy

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.

Remedy

https://git.kernel.org/linus/0aaba41b58bc5f3074c0c0a6136b9500b5e29e19

Remedy

https://git.kernel.org/linus/316ec154810960052d4586b634156c54d0778f74|local-2020-11884-fix

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2020-11884.

  • What is the severity of CVE-2020-11884?

    The severity of CVE-2020-11884 is high with a severity value of 7.

  • How does CVE-2020-11884 occur?

    CVE-2020-11884 occurs on multiprocessing systems when one s390 CPU is in Secondary Address Mode and another CPU does a kernel page table upgrade.

  • What is the affected software for CVE-2020-11884?

    The affected software includes Linux kernels 4.19 through 5.6.7 on the s390 platform.

  • Is there a fix for CVE-2020-11884?

    Yes, there are remediation steps available for CVE-2020-11884. Please refer to the references for more information.

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