CVE-2021-43056
First published: Mon Oct 25 2021(Updated: )
An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:4.18.0-372.9.1.el8 | 0:4.18.0-372.9.1.el8 |
| Linux Linux kernel | >=5.2<5.4.15 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 | |
| redhat/kernel | <5.15 | 5.15 |
| ubuntu/linux | <5.4.0-92.103 | 5.4.0-92.103 |
| ubuntu/linux | <5.11.0-44.48 | 5.11.0-44.48 |
| ubuntu/linux | <5.13.0-23.23 | 5.13.0-23.23 |
| ubuntu/linux | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws | <5.4.0-1061.64 | 5.4.0-1061.64 |
| ubuntu/linux-aws | <5.11.0-1023.24 | 5.11.0-1023.24 |
| ubuntu/linux-aws | <5.13.0-1008.9 | 5.13.0-1008.9 |
| ubuntu/linux-aws | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.0 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.11 | <5.11.0-1023.24~20.04.1 | 5.11.0-1023.24~20.04.1 |
| ubuntu/linux-aws-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.4 | <5.4.0-1061.64~18.04.1 | 5.4.0-1061.64~18.04.1 |
| ubuntu/linux-aws-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-5.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-fips | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-aws-hwe | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure | <5.4.0-1065.68 | 5.4.0-1065.68 |
| ubuntu/linux-azure | <5.11.0-1023.24 | 5.11.0-1023.24 |
| ubuntu/linux-azure | <5.13.0-1009.10 | 5.13.0-1009.10 |
| ubuntu/linux-azure | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-4.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-5.11 | <5.11.0-1023.24~20.04.1 | 5.11.0-1023.24~20.04.1 |
| ubuntu/linux-azure-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-5.4 | <5.4.0-1065.68~18.04.1 | 5.4.0-1065.68~18.04.1 |
| ubuntu/linux-azure-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-edge | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-fde | <5.4.0-1065.68 | 5.4.0-1065.68 |
| ubuntu/linux-azure-fde | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-fde-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-azure-fips | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-bluefield | <5.4.0-1023.26 | 5.4.0-1023.26 |
| ubuntu/linux-bluefield | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-dell300x | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-fips | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp | <5.4.0-1059.63 | 5.4.0-1059.63 |
| ubuntu/linux-gcp | <5.11.0-1024.26 | 5.11.0-1024.26 |
| ubuntu/linux-gcp | <5.13.0-1008.9 | 5.13.0-1008.9 |
| ubuntu/linux-gcp | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-4.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-5.11 | <5.11.0-1024.26~20.04.1 | 5.11.0-1024.26~20.04.1 |
| ubuntu/linux-gcp-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-5.4 | <5.4.0-1059.63~18.04.1 | 5.4.0-1059.63~18.04.1 |
| ubuntu/linux-gcp-5.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gcp-fips | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gke | <5.4.0-1057.60 | 5.4.0-1057.60 |
| ubuntu/linux-gke | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gke-4.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gke-5.0 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gke-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gke-5.4 | <5.4.0-1057.60~18.04.1 | 5.4.0-1057.60~18.04.1 |
| ubuntu/linux-gke-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gkeop | <5.4.0-1029.30 | 5.4.0-1029.30 |
| ubuntu/linux-gkeop | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gkeop-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-gkeop-5.4 | <5.4.0-1029.30~18.04.2 | 5.4.0-1029.30~18.04.2 |
| ubuntu/linux-gkeop-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-5.11 | <5.11.0-44.48~20.04.2 | 5.11.0-44.48~20.04.2 |
| ubuntu/linux-hwe-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-5.13 | <5.13.0-23.23~20.04.2 | 5.13.0-23.23~20.04.2 |
| ubuntu/linux-hwe-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-5.4 | <5.4.0-92.103~18.04.2 | 5.4.0-92.103~18.04.2 |
| ubuntu/linux-hwe-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-5.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-hwe-edge | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-ibm | <5.4.0-1010.11 | 5.4.0-1010.11 |
| ubuntu/linux-ibm | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-ibm-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-ibm-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-intel | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-intel-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-intel-iotg | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-intel-iotg-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-iot | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-kvm | <5.4.0-1051.53 | 5.4.0-1051.53 |
| ubuntu/linux-kvm | <5.11.0-1021.23 | 5.11.0-1021.23 |
| ubuntu/linux-kvm | <5.13.0-1007.7 | 5.13.0-1007.7 |
| ubuntu/linux-kvm | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-laptop | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-lowlatency | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-lowlatency-hwe-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-lts-xenial | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-nvidia | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-nvidia-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-nvidia-6.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-nvidia-lowlatency | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-5.10 | <5.10.0-1051.53 | 5.10.0-1051.53 |
| ubuntu/linux-oem-5.10 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-5.13 | <5.13.0-1026.32 | 5.13.0-1026.32 |
| ubuntu/linux-oem-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-5.14 | <5.14.0-1008.8 | 5.14.0-1008.8 |
| ubuntu/linux-oem-5.17 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-5.6 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-6.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oem-osp1 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle | <5.4.0-1059.63 | 5.4.0-1059.63 |
| ubuntu/linux-oracle | <5.11.0-1023.24 | 5.11.0-1023.24 |
| ubuntu/linux-oracle | <5.13.0-1011.13 | 5.13.0-1011.13 |
| ubuntu/linux-oracle | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.0 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.11 | <5.11.0-1023.24~20.04.1 | 5.11.0-1023.24~20.04.1 |
| ubuntu/linux-oracle-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.13 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-oracle-5.4 | <5.4.0-1059.63~18.04.1 | 5.4.0-1059.63~18.04.1 |
| ubuntu/linux-oracle-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-raspi | <5.4.0-1048.53 | 5.4.0-1048.53 |
| ubuntu/linux-raspi | <5.11.0-1024.26 | 5.11.0-1024.26 |
| ubuntu/linux-raspi | <5.13.0-1012.14 | 5.13.0-1012.14 |
| ubuntu/linux-raspi | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-raspi-5.4 | <5.4.0-1048.53~18.04.1 | 5.4.0-1048.53~18.04.1 |
| ubuntu/linux-raspi-5.4 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-raspi2 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-raspi2-5.3 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-riscv | <5.11.0-1024.25 | 5.11.0-1024.25 |
| ubuntu/linux-riscv | <5.13.0-1007.7 | 5.13.0-1007.7 |
| ubuntu/linux-riscv | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-riscv-5.11 | <5.11.0-1024.25~20.04.1 | 5.11.0-1024.25~20.04.1 |
| ubuntu/linux-riscv-5.11 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-riscv-5.15 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-riscv-5.8 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-riscv-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-snapdragon | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-starfive | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-starfive-6.5 | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| ubuntu/linux-xilinx-zynqmp | <5.15~<5.4.156 | 5.15~ 5.4.156 |
| debian/linux | 5.10.218-1 5.10.221-1 6.1.94-1 6.1.99-1 6.9.12-1 6.10.3-1 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-43056 https://nvd.nist.gov/vuln/detail/CVE-2021-43056 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337
- https://bugzilla.redhat.com/show_bug.cgi?id=2017073
- https://access.redhat.com/errata/RHSA-2022:1988
- https://access.redhat.com/security/cve/cve-2021-43056
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337
- https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf@mpe.ellerman.id.au/T/#u
- http://www.openwall.com/lists/oss-security/2021/10/28/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/
- https://launchpad.net/bugs/cve/CVE-2021-43056
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/
- https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf%40mpe.ellerman.id.au/T/#u
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2017074
- https://security-tracker.debian.org/tracker/CVE-2021-43056
- https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337 (5.15-rc6)
- https://ubuntu.com/security/notices/USN-5139-1
- https://ubuntu.com/security/notices/USN-5165-1
- https://ubuntu.com/security/notices/USN-5208-1
- https://ubuntu.com/security/notices/USN-5210-1
- https://ubuntu.com/security/notices/USN-5218-1
- https://www.cve.org/CVERecord?id=CVE-2021-43056
- https://nvd.nist.gov/vuln/detail/CVE-2021-43056
- https://git.kernel.org/linus/10d91611f426d4bafd2a83d966c36da811b2f7ad
- https://ubuntu.com/security/CVE-2021-43056
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/nvd-index
- agent/software-canonical-lookup
- agent/remedy
- agent/weakness
- agent/severity
- agent/description
- collector/nvd-cve
- source/NVD
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-43056
- agent/references
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/tags
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.2
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35
- package-manager/ubuntu
- package-manager/debian