CVE - CVE-2021-47112

CVE-ID
CVE-2021-47112	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2 URL:https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2 MISC:https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54 URL:https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54 MISC:https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4 URL:https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4 MISC:https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6 URL:https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6
Assigning CNA
kernel.org
Date Record Created
20240304	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240304)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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