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Related Vulnerabilities: 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 arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.

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Description

The MITRE CVE dictionary describes this issue as:

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.

Additional Information

Bugzilla 2017073: CVE-2021-43056 kernel: ppc: kvm: allows a malicious KVM guest to crash the host
CWE-252: Unchecked Return Value
FAQ: Frequently asked questions about CVE-2021-43056

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CVE-2021-43056

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