github - ghsa-928c-mw7v-gxfh

GHSA-928C-MW7V-GXFH

Vulnerability from github – Published: 2022-02-10 00:00 – Updated: 2025-11-04 21:30

Details

An unsafe pointer vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler. An attacker can use this unsafe pointer "ptr" to read or write or manipulate data in the SMRAM. Exploitation of this vulnerability can lead to escalation of privileges reserved only for SMM using the SwSMI handler.

Severity ?

8.2 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-41838"
  ],
  "database_specific": {
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      "CWE-119"
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    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "HIGH"
  },
  "details": "An unsafe pointer vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler. An attacker can use this unsafe pointer \"ptr\" to read or write or manipulate data in the SMRAM. Exploitation of this vulnerability can lead to escalation of privileges reserved only for SMM using the SwSMI handler.",
  "id": "GHSA-928c-mw7v-gxfh",
  "modified": "2025-11-04T21:30:26Z",
  "published": "2022-02-10T00:00:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41838"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220222-0001"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/security-pledge"
    },
    {
      "type": "WEB",
      "url": "https://www.insyde.com/security-pledge/SA-2022023"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/796611"
    }
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  "schema_version": "1.4.0",
  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-41838 (GCVE-0-2021-41838)

Vulnerability from cvelistv5 – Published: 2022-02-03 01:43 – Updated: 2025-11-04 19:12

Summary

An issue was discovered in SdHostDriver in the kernel 5.0 through 5.5 in Insyde InsydeH2O. There is an SMM callout that allows an attacker to access the System Management Mode and execute arbitrary code. This occurs because of a Numeric Range Comparison Without a Minimum Check.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Tags

	https://www.insyde.com/security-pledge	x_refsource_MISC
	https://www.insyde.com/security-pledge/SA-2022023	x_refsource_MISC
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
	https://security.netapp.com/advisory/ntap-2022022…	x_refsource_CONFIRM

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            "url": "https://www.insyde.com/security-pledge"
          },
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            "url": "https://www.insyde.com/security-pledge/SA-2022023"
          },
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            "tags": [
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              "x_transferred"
            ],
            "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"
          },
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            "url": "https://www.kb.cert.org/vuls/id/796611"
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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-928C-MW7V-GXFH

CVE-2021-41838 (GCVE-0-2021-41838)

Tags

Sightings

Nomenclature