CVE-2021-43056

Published on: 10/27/2021 12:00:00 AM UTC

Last Modified on: 11/28/2021 11:31:00 PM UTC

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Certain versions of Fedora from Fedoraproject contain the following vulnerability:

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.

  • CVE-2021-43056 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 5.5 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
LOCAL LOW LOW NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 4.9 - MEDIUM

Access
Vector
Access
Complexity
Authentication
LOCAL LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
NONE NONE COMPLETE

CVE References

Description Tags Link
oss-security - Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8 www.openwall.com
text/html
URL Logo MLIST [oss-security] 20211028 Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8
kernel/git/torvalds/linux.git - Linux kernel source tree git.kernel.org
text/html
URL Logo MISC git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337
[SECURITY] Fedora 35 Update: kernel-5.14.15-300.fc35 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-ed8c2e1098
[SECURITY] Fedora 33 Update: kernel-5.14.15-100.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-4fed2b55c4
Linux kernel: powerpc: KVM guest can trigger host crash on Power8 lore.kernel.org
text/html
URL Logo MISC lore.kernel.org/linuxppc-dev/[email protected]/T/#u
cdn.kernel.org
text/plain
URL Logo MISC cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
[SECURITY] Fedora 34 Update: kernel-5.14.15-200.fc34 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
text/html
URL Logo FEDORA FEDORA-2021-4320606094

Related QID Numbers

  • 198569 Ubuntu Security Notification for Linux kernel (OEM 5.10) Vulnerabilities (USN-5139-1)
  • 198589 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5165-1)
  • 198618 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5210-1)
  • 198621 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5208-1)
  • 198627 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5218-1)
  • 282035 Fedora Security Update for kernel (FEDORA-2021-4320606094)
  • 282036 Fedora Security Update for kernel (FEDORA-2021-4fed2b55c4)
  • 751336 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1460-1)
  • 751342 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3641-1)
  • 751346 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3655-1)
  • 751349 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1477-1)
  • 751353 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3675-1)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
FedoraprojectFedora33AllAllAll
Operating
System
FedoraprojectFedora34AllAllAll
Operating
System
FedoraprojectFedora35AllAllAll
Operating
System
LinuxLinux KernelAllAllAllAll
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*:
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-43056 : An issue was discovered in the #Linux #kernel for powerpc before 5.14.15. It allows a malicious KV… twitter.com/i/web/status/1… 2021-10-28 04:04:55
Twitter Icon @LinInfoSec Kvm - CVE-2021-43056: git.kernel.org/linus/cdeb5d7d… 2021-10-28 05:51:39
Twitter Icon @0_exploit CVE-2021-43056 dlvr.it/SBRhjv 2021-10-28 08:27:04
© CVE.report 2022 Twitter Nitter Twitter Viewer |

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