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CVE-2022-36021

Status: ModifiedMedium (5.5)—

Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Redis — Redis

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2022-36021",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-36021",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-03-07T21:03:10.863206Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "redis",
          "product": "redis",
          "versions": [
            {
              "status": "affected",
              "version": "< 6.0.18"
            },
            {
              "status": "affected",
              "version": ">= 6.2.0, < 6.2.11"
            },
            {
              "status": "affected",
              "version": ">= 7.0.0, < 7.0.9"
            }
          ]
        }
      ]
    }
  ],
  "published": "2023-03-01T16:15:09.400",
  "references": [
    {
      "url": "https://github.com/redis/redis/commit/dcbfcb916ca1a269b3feef86ee86835294758f84",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/redis/redis/security/advisories/GHSA-jr7j-rfj5-8xqv",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/redis/redis/commit/dcbfcb916ca1a269b3feef86ee86835294758f84",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/redis/redis/security/advisories/GHSA-jr7j-rfj5-8xqv",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-407"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-407"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.\n"
    }
  ],
  "lastModified": "2026-06-17T04:52:45.480",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6F70AB47-0452-4438-87FC-6CBD440815EF",
              "versionEndExcluding": "6.0.18"
            },
            {
              "criteria": "cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F953DA13-66E1-4983-9744-F861931E8628",
              "versionEndExcluding": "6.2.11",
              "versionStartIncluding": "6.2.0"
            },
            {
              "criteria": "cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BB0A4E48-9EF2-4F32-B72C-7F243EC31DB2",
              "versionEndExcluding": "7.0.9",
              "versionStartIncluding": "7.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}