gsd-2021-47112
Vulnerability from gsd
Modified
2024-03-05 06:03
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.
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2021-47112" ], "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": "GSD-2021-47112", "modified": "2024-03-05T06:03:55.148576Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "cve@kernel.org", "ID": "CVE-2021-47112", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "\u003c", "version_name": "1da177e4c3f4", "version_value": "7620a669111b" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected", "versions": [ { "lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.125", "versionType": "custom" }, { "lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.43", "versionType": "custom" }, { "lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.10", "versionType": "custom" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix" } ] } } ] } } ] }, "vendor_name": "Linux" } ] } }, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "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." } ] }, "generator": { "engine": "bippy-8df59b4913de" }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "references": { "reference_data": [ { "name": "https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54" }, { "name": "https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2" }, { "name": "https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6" }, { "name": "https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4", "refsource": "MISC", "url": "https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4" } ] } }, "nvd.nist.gov": { "cve": { "descriptions": [ { "lang": "en", "value": "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": "CVE-2021-47112", "lastModified": "2024-03-17T22:38:29.433", "metrics": {}, "published": "2024-03-15T21:15:06.627", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis" } } } }
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Sightings
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Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- 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.