github - ghsa-wp53-p3r5-cq4w

GHSA-WP53-P3R5-CQ4W

Vulnerability from github – Published: 2022-05-12 00:01 – Updated: 2022-05-20 00:00

Details

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Severity ?

3.3 (Low)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2021-26342"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-05-11T17:15:00Z",
    "severity": "LOW"
  },
  "details": "In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.",
  "id": "GHSA-wp53-p3r5-cq4w",
  "modified": "2022-05-20T00:00:25Z",
  "published": "2022-05-12T00:01:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26342"
    },
    {
      "type": "WEB",
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-26342 (GCVE-0-2021-26342)

Vulnerability from cvelistv5 – Published: 2022-05-11 16:21 – Updated: 2024-09-16 16:32

Summary

Severity ?

No CVSS data available.

CWE

Assigner

AMD

References

URL

Tags

https://www.amd.com/en/corporate/product-security…

x_refsource_MISC

Impacted products

	Vendor	Product	Version
	AMD	EPYC™ Processors	Affected: various

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              "x_transferred"
            ],
            "url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "EPYC\u2122 Processors",
          "vendor": "AMD",
          "versions": [
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              "version": "various"
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        }
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        "dateUpdated": "2022-05-11T16:21:04",
        "orgId": "b58fc414-a1e4-4f92-9d70-1add41838648",
        "shortName": "AMD"
      },
      "references": [
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        "discovery": "UNKNOWN"
      },
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      },
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        },
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-WP53-P3R5-CQ4W

CVE-2021-26342 (GCVE-0-2021-26342)

Tags

Sightings

Nomenclature