NCSC-2026-0032

Vulnerability from csaf_ncscnl - Published: 2026-01-21 10:12 - Updated: 2026-01-21 10:12
Summary
Kwetsbaarheden verholpen in Oracle MySQL

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Oracle heeft kwetsbaarheden verholpen in diverse Oracle MySQL componenten.
Interpretaties
De kwetsbaarheden stellen hooggeprivilegieerde aanvallers in staat om de server op afstand te exploiteren, wat kan leiden tot servercrashes en Denial of Service. Dit probleem kan worden misbruikt door aanvallers met netwerktoegang, wat de noodzaak van aandacht van beveiligingsbeheerders onderstreept.
Oplossingen
Oracle heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-122
Heap-based Buffer Overflow
CWE-125
Out-of-bounds Read
CWE-197
Numeric Truncation Error
CWE-787
Out-of-bounds Write
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          "title": "Summary"
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    },
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      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL Server versions 8.0.0-8.0.44, 8.4.0-8.4.7, and 9.0.0-9.5.0 allows high-privileged attackers to remotely exploit it, potentially causing denial of service with a CVSS score of 4.9.",
          "title": "Summary"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21948.json"
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          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21949 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21949.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21949"
    },
    {
      "cve": "CVE-2026-21950",
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL Server (versions 9.0.0-9.5.0) allows low-privileged attackers to cause denial of service, leading to server crashes, with a CVSS score of 6.5 indicating significant availability impacts.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21950 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21950.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21950"
    },
    {
      "cve": "CVE-2026-21952",
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL Server (versions 9.0.0-9.5.0) allows high-privileged attackers to cause denial of service, leading to server crashes, with a CVSS 3.1 Base Score of 4.9.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21952 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21952.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21952"
    },
    {
      "cve": "CVE-2026-21964",
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL\u0027s Server: Thread Pooling component affects specific versions, allowing high-privileged attackers to remotely exploit it, potentially leading to denial of service with a CVSS score of 4.9.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21964 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21964.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21964"
    },
    {
      "cve": "CVE-2026-21965",
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL Server (versions 9.0.0-9.5.0) allows high-privileged attackers with network access to potentially cause a partial denial of service, rated with a CVSS 3.1 Base Score of 2.7.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21965 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21965.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 2.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21965"
    },
    {
      "cve": "CVE-2026-21968",
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability in Oracle MySQL Server versions 8.0.0-8.0.44, 8.4.0-8.4.7, and 9.0.0-9.5.0 allows low-privileged attackers to cause denial of service via network access, with a CVSS score of 6.5.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2",
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-21968 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-21968.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2",
            "CSAFPID-3",
            "CSAFPID-4",
            "CSAFPID-5",
            "CSAFPID-6"
          ]
        }
      ],
      "title": "CVE-2026-21968"
    }
  ]
}


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Tags
Taxonomy of the tags.




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.