FKIE_CVE-2026-56684

Vulnerability from fkie_nvd - Published: 2026-08-18 15:16 - Updated: 2026-08-18 15:16
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.
References
security-advisories@github.comhttps://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3
security-advisories@github.comhttps://github.com/valkey-io/valkey/pull/4234
security-advisories@github.comhttps://github.com/valkey-io/valkey/releases/tag/7.2.14
security-advisories@github.comhttps://github.com/valkey-io/valkey/releases/tag/8.0.10
security-advisories@github.comhttps://github.com/valkey-io/valkey/releases/tag/8.1.9
security-advisories@github.comhttps://github.com/valkey-io/valkey/releases/tag/9.0.5
security-advisories@github.comhttps://github.com/valkey-io/valkey/releases/tag/9.1.1
security-advisories@github.comhttps://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "valkey",
          "vendor": "valkey-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.2.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0, \u003c 8.0.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.1.0, \u003c 8.1.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 9.0.0, \u003c 9.0.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 9.1.0, \u003c 9.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey\u0027s tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator\u0027s cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1."
    }
  ],
  "id": "CVE-2026-56684",
  "lastModified": "2026-08-18T15:16:55.463",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-56684",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T14:55:18.462428Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-18T15:16:55.463",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/pull/4234"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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