GSD-2021-4002

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.
Aliases
Aliases
CVE-2021-4002
To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-4002",
    "description": "A memory leak flaw in the Linux kernel\u0027s hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.",
    "id": "GSD-2021-4002",
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      "https://www.debian.org/security/2022/dsa-5096",
      "https://ubuntu.com/security/CVE-2021-4002",
      "https://advisories.mageia.org/CVE-2021-4002.html",
      "https://security.archlinux.org/CVE-2021-4002",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-4002.html",
      "https://linux.oracle.com/cve/CVE-2021-4002.html",
      "https://access.redhat.com/errata/RHSA-2022:1975",
      "https://access.redhat.com/errata/RHSA-2022:1988"
    ]
  },
  "gsd": {
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      "remediation": "unknown",
      "reportConfidence": "confirmed",
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      "id": "GSD-2021-4002",
      "modified": "2023-12-13T01:23:11.659032Z",
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        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 3.6,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N",
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          "impactScore": 4.9,
          "obtainAllPrivilege": false,
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          "obtainUserPrivilege": false,
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          "userInteractionRequired": false
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            "confidentialityImpact": "LOW",
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            "scope": "UNCHANGED",
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      },
      "lastModifiedDate": "2023-02-22T17:46Z",
      "publishedDate": "2022-03-03T22:15Z"
    }
  }
}


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  • 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.