synced 7 MIN AGO
01 Record

CVE-2021-43056

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

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.36% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 30.4% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-10-28 03:13Z5 YR AGO
Last updated
2024-08-04 03:47Z2 YR AGO
Reserved
2021-10-28
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.1
Document digest
547903b5c0b05fe11de32d7cee41e6761c178c919929d82f622b23a10b91a6cb

05 Affected products

VendorProductVersionsPlatforms
fedoraprojectfedoraNot specified—
linuxlinux_kernelNot specified—
redhatenterprise_linuxNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • bpftool
    Fixed in 4.18.0-372.9.1.el8
  • kernel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-abi-stablelists
    Fixed in 4.18.0-372.9.1.el8
  • kernel-core
    Fixed in 4.18.0-372.9.1.el8
  • kernel-cross-headers
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-core
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-devel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-modules
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-modules-extra
    Fixed in 4.18.0-372.9.1.el8
  • kernel-devel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-doc
    Fixed in 4.18.0-372.9.1.el8
  • kernel-headers
    Fixed in 4.18.0-372.9.1.el8
  • kernel-modules
    Fixed in 4.18.0-372.9.1.el8
  • kernel-modules-extra
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools-libs
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools-libs-devel
    Fixed in 4.18.0-372.9.1.el8
  • perf
    Fixed in 4.18.0-372.9.1.el8
  • python3-perf
    Fixed in 4.18.0-372.9.1.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • linux
    Not affected

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • bpftool
    Fixed in 4.18.0-372.9.1.el8
  • kernel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-abi-stablelists
    Fixed in 4.18.0-372.9.1.el8
  • kernel-core
    Fixed in 4.18.0-372.9.1.el8
  • kernel-cross-headers
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-core
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-devel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-modules
    Fixed in 4.18.0-372.9.1.el8
  • kernel-debug-modules-extra
    Fixed in 4.18.0-372.9.1.el8
  • kernel-devel
    Fixed in 4.18.0-372.9.1.el8
  • kernel-doc
    Fixed in 4.18.0-372.9.1.el8
  • kernel-headers
    Fixed in 4.18.0-372.9.1.el8
  • kernel-modules
    Fixed in 4.18.0-372.9.1.el8
  • kernel-modules-extra
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools-libs
    Fixed in 4.18.0-372.9.1.el8
  • kernel-tools-libs-devel
    Fixed in 4.18.0-372.9.1.el8
  • perf
    Fixed in 4.18.0-372.9.1.el8
  • python3-perf
    Fixed in 4.18.0-372.9.1.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • linux
    Fixed in 5.14.16-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • linux
    Fixed in 5.14.16-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • linux
    Fixed in 5.14.16-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • linux-hwe-edge
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • linux-aws-5.0
    No fix yet
  • linux-aws-5.3
    No fix yet
  • linux-aws-5.4
    Fixed in 5.4.0-1061.64~18.04.1
  • linux-azure
    No fix yet
  • linux-azure-5.3
    No fix yet
  • linux-azure-5.4
    Fixed in 5.4.0-1065.68~18.04.1
  • linux-azure-edge
    No fix yet
  • linux-gcp
    No fix yet
  • linux-gcp-5.3
    No fix yet
  • linux-gcp-5.4
    Fixed in 5.4.0-1059.63~18.04.1
  • linux-gke-4.15
    No fix yet
  • linux-gke-5.4
    Fixed in 5.4.0-1057.60~18.04.1
  • linux-gkeop-5.4
    Fixed in 5.4.0-1029.30~18.04.2
  • linux-hwe
    No fix yet
  • linux-hwe-5.4
    Fixed in 5.4.0-92.103~18.04.2
  • linux-hwe-edge
    No fix yet
  • linux-oem
    No fix yet
  • linux-oracle-5.0
    No fix yet
  • linux-oracle-5.3
    No fix yet
  • linux-oracle-5.4
    Fixed in 5.4.0-1059.63~18.04.1
  • linux-raspi-5.4
    Fixed in 5.4.0-1048.53~18.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • linux
    Fixed in 5.4.0-92.103
  • linux-aws
    Fixed in 5.4.0-1061.64
  • linux-aws-5.11
    Fixed in 5.11.0-1023.24~20.04.1
  • linux-aws-5.8
    No fix yet
  • linux-azure
    Fixed in 5.4.0-1065.68
  • linux-azure-5.11
    Fixed in 5.11.0-1023.24~20.04.1
  • linux-azure-5.8
    No fix yet
  • linux-bluefield
    Fixed in 5.4.0-1023.26
  • linux-gcp
    Fixed in 5.4.0-1059.63
  • linux-gcp-5.11
    Fixed in 5.11.0-1024.26~20.04.1
  • linux-gcp-5.8
    No fix yet
  • linux-gke
    Fixed in 5.4.0-1057.60
  • linux-gkeop
    Fixed in 5.4.0-1029.30
  • linux-hwe-5.11
    Fixed in 5.11.0-44.48~20.04.2
  • linux-hwe-5.13
    Fixed in 5.13.0-23.23~20.04.2
  • linux-hwe-5.8
    No fix yet
  • linux-ibm
    Fixed in 5.4.0-1010.11
  • linux-intel-5.13
    No fix yet
  • linux-kvm
    Fixed in 5.4.0-1051.53
  • linux-oem-5.10
    Fixed in 5.10.0-1051.53
  • linux-oem-5.13
    Fixed in 5.13.0-1026.32
  • linux-oem-5.14
    Fixed in 5.14.0-1008.8
  • linux-oem-5.6
    No fix yet
  • linux-oracle
    Fixed in 5.4.0-1059.63
  • linux-oracle-5.11
    Fixed in 5.11.0-1023.24~20.04.1
  • linux-oracle-5.8
    No fix yet
  • linux-raspi
    Fixed in 5.4.0-1048.53
  • linux-raspi2
    No fix yet
  • linux-riscv
    No fix yet
  • linux-riscv-5.11
    Fixed in 5.11.0-1024.25~20.04.1
  • linux-riscv-5.8
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • linux-intel-iot-realtime
    No fix yet
  • linux-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • linux-raspi-realtime
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 20.04 LTS

  • linux-aws-fips
    Fixed in 5.4.0-1069.73+fips2
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-azure-fips
    Fixed in 5.4.0-1073.76+fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-fips
    Fixed in 5.4.0-1038.44
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • linux-gcp-fips
    Fixed in 5.4.0-1067.71~20.04.1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS 20.04 LTS

  • linux-aws-fips
    No fix yet
  • linux-azure-fips
    No fix yet
  • linux-fips
    No fix yet
  • linux-gcp-fips
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.