A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
CVSS Details
- CVSS 3.1 Base Score: 8
- CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- CVSS 3.0 Base Score: 6.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfoUpgrade perfUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernelUpgrade kernel-develUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade python-perf | Apr 27, 2020 | Dec 18, 2018 |
| Amazon_linux | — | Upgrade kernel | Jan 25, 2019 | Dec 18, 2018 |
| Centos_linux | — | Upgrade kernelUpgrade kernel-rt | Aug 1, 2019 | Dec 18, 2018 |
| Debian | — | Upgrade linux | Mar 28, 2019 | Dec 18, 2018 |
| Huawei Euleros 2_0_sp2 | — | Upgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-libsUpgrade kernel-debug-develUpgrade kernelUpgrade kernel-debugUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-develUpgrade perf | May 30, 2019 | Dec 18, 2018 |
| Huawei Euleros 2_0_sp3 | — | Upgrade kernel-toolsUpgrade perfUpgrade kernel-headersUpgrade python-perfUpgrade kernel-debuginfoUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64 | May 30, 2019 | Dec 18, 2018 |
| Huawei Euleros 2_0_sp5 | — | Upgrade perfUpgrade kernel-debuginfoUpgrade kernel-develUpgrade kernel-toolsUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-libsUpgrade python-perfUpgrade kernel | May 1, 2019 | Dec 18, 2018 |
| Oracle_linux | — | Upgrade kernelUpgrade kernel-uek | Jul 31, 2019 | Nov 27, 2018 |
| Redhat Openshift | — | Upgrade redhat-coreos | Dec 29, 2020 | Dec 18, 2018 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernel | Jul 30, 2019 | Dec 18, 2018 |
| Suse | — | Upgrade kernel-source-azureUpgrade kernel-defaultUpgrade kernel-azure-baseUpgrade kernel-obs-buildUpgrade kernel-docsUpgrade kernel-default-manUpgrade kernel-default-extraUpgrade kernel-devel-azure | Jan 18, 2019 | Dec 18, 2018 |
| Ubuntu | — | Upgrade linux-image-powerpc64-smp-lts-xenialUpgrade linux-image-4.15.0-1039-awsUpgrade linux-image-4.18.0-20-lowlatencyUpgrade linux-image-powerpc-e500mcUpgrade linux-image-4.4.0-1110-snapdragonUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-virtual-lts-xenialUpgrade linux-image-oemUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-4.4.0-1043-kvmUpgrade linux-image-azureUpgrade linux-image-4.4.0-144-powerpc64-smpUpgrade linux-image-4.4.0-144-powerpc-e500mcUpgrade linux-image-4.18.0-1014-raspi2Upgrade linux-image-4.4.0-144-genericUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-powerpc64-smpUpgrade linux-image-generic-lpae-hwe-18.04Upgrade linux-image-generic-hwe-16.04Upgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-4.15.0-50-generic-lpaeUpgrade linux-image-generic-lpaeUpgrade linux-image-4.18.0-20-genericUpgrade linux-image-gkeUpgrade linux-image-generic-lts-xenialUpgrade linux-image-4.4.0-145-powerpc64-smpUpgrade linux-image-genericUpgrade linux-image-snapdragonUpgrade linux-image-4.4.0-145-powerpc64-embUpgrade linux-image-4.4.0-144-powerpc64-embUpgrade linux-image-4.4.0-1040-awsUpgrade linux-image-4.4.0-1079-awsUpgrade linux-image-4.4.0-145-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-4.18.0-20-generic-lpaeUpgrade linux-image-powerpc64-embUpgrade linux-image-4.15.0-1045-azureUpgrade linux-image-4.15.0-1032-gcpUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-4.15.0-1013-oracleUpgrade linux-image-powerpc-smpUpgrade linux-image-4.15.0-1038-oemUpgrade linux-image-4.15.0-1053-snapdragonUpgrade linux-image-4.4.0-144-generic-lpaeUpgrade linux-image-4.18.0-1011-gcpUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-4.4.0-145-generic-lpaeUpgrade linux-image-4.15.0-50-genericUpgrade linux-image-powerpc-smp-lts-xenialUpgrade linux-image-4.18.0-1016-awsUpgrade linux-image-raspi2Upgrade linux-image-4.4.0-144-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-4.4.0-145-genericUpgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-145-powerpc-e500mcUpgrade linux-image-powerpc-e500mc-lts-xenialUpgrade linux-image-4.4.0-144-powerpc-smpUpgrade linux-image-powerpc64-emb-lts-xenialUpgrade linux-image-4.15.0-50-lowlatencyUpgrade linux-image-4.18.0-1018-azureUpgrade linux-image-awsUpgrade linux-image-kvmUpgrade linux-image-generic-lpae-hwe-16.04Upgrade linux-image-4.15.0-1036-raspi2Upgrade linux-image-4.4.0-145-powerpc-smpUpgrade linux-image-4.15.0-1034-kvmUpgrade linux-image-4.18.0-20-snapdragonUpgrade linux-image-gcpUpgrade linux-image-generic-lpae-lts-xenialUpgrade linux-image-4.18.0-1012-kvmUpgrade linux-image-4.4.0-1106-raspi2Upgrade linux-image-virtual-hwe-16.04 | Apr 9, 2019 | Dec 18, 2018 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub