github - ghsa-fq4q-x842-fmrh

ghsa-fq4q-x842-fmrh

Vulnerability from github

Published

2024-03-15 21:30

Modified

2024-03-15 21:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47112"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-15T21:15:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/kvm: Teardown PV features on boot CPU as well\n\nVarious PV features (Async PF, PV EOI, steal time) work through memory\nshared with hypervisor and when we restore from hibernation we must\nproperly teardown all these features to make sure hypervisor doesn\u0027t\nwrite to stale locations after we jump to the previously hibernated kernel\n(which can try to place anything there). For secondary CPUs the job is\nalready done by kvm_cpu_down_prepare(), register syscore ops to do\nthe same for boot CPU.",
  "id": "GHSA-fq4q-x842-fmrh",
  "modified": "2024-03-15T21:30:43Z",
  "published": "2024-03-15T21:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47112"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2"
    },
    {
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      "url": "https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54"
    },
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      "url": "https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-47112

Vulnerability from cvelistv5

Published

2024-03-15 20:14

Modified

2024-11-04 11:59

Severity ?

Summary

x86/kvm: Teardown PV features on boot CPU as well

References

▼	URL	Tags
	https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54
	https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2
	https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6
	https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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