CVE-2021-47112 - OpenCVE

In the Linux kernel, the following vulnerability has been resolved: x86/kvm: Teardown PV features on boot CPU as well Various PV features (Async PF, PV EOI, steal time) work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to make sure hypervisor doesn't write to stale locations after we jump to the previously hibernated kernel (which can try to place anything there). For secondary CPUs the job is already done by kvm_cpu_down_prepare(), register syscore ops to do the same for boot CPU.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

References

Link	Providers
https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2
https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54
https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4
https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6
https://lore.kernel.org/linux-cve-announce/2024031507-CVE-2021-47112-339c@gregkh/T/#u
https://nvd.nist.gov/vuln/detail/CVE-2021-47112
https://www.cve.org/CVERecord?id=CVE-2021-47112

History

No history.

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-03-15T20:14:20.602Z

Updated: 2024-08-04T05:24:39.829Z

Reserved: 2024-03-04T18:12:48.836Z

Link: CVE-2021-47112

Vulnrichment

Updated: 2024-08-04T05:24:39.829Z

NVD

Status : Awaiting Analysis

Published: 2024-03-15T21:15:06.627

Modified: 2024-03-17T22:38:29.433

Link: CVE-2021-47112

Redhat

Severity : Low

Publid Date: 2024-03-15T00:00:00Z

Links: CVE-2021-47112 - Bugzilla

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