{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "lang": "en-US",
    "publisher": {
      "category": "coordinator",
      "contact_details": "https://www.cisa.gov/report",
      "issuing_authority": "CISA",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "title": "Redis TLS pending-data list use-after-free",
    "tracking": {
      "current_release_date": "2026-08-27T19:51:09Z",
      "generator": {
        "engine": {
          "name": "VINCE-NT",
          "version": "1.15.0+build.116"
        }
      },
      "id": "VA-26-239-01",
      "initial_release_date": "2026-08-27T19:51:09Z",
      "status": "final",
      "version": "1.0.0",
      "revision_history": [
        {
          "number": "1.0.0",
          "summary": "Initial publication",
          "date": "2026-08-27T19:51:09Z"
        }
      ]
    },
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "text": "All information products included in [https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white](https://github.com/cisagov/CSAF/tree/develop/csaf_files/IT/white) are provided \\\"as is\\\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see [https://us-cert.cisa.gov/tlp/](https://us-cert.cisa.gov/tlp/).",
        "title": "Legal Notice",
        "category": "legal_disclaimer"
      },
      {
        "text": "Worldwide",
        "title": "Countries and Areas Deployed",
        "category": "other"
      },
      {
        "text": "Information Technology",
        "title": "Critical Infrastructure Sectors",
        "category": "other"
      },
      {
        "text": "Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server.",
        "title": "Risk Evaluation",
        "category": "summary"
      },
      {
        "text": "Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.",
        "title": "Recommended Practices",
        "category": "general"
      },
      {
        "text": "United States",
        "title": "Company Headquarters Location",
        "category": "other"
      }
    ],
    "references": [
      {
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-239-01.json",
        "summary": "Vulnerability Advisory VA-26-239-01 CSAF",
        "category": "self"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "category": "vendor",
        "name": "Redis",
        "branches": [
          {
            "category": "product_name",
            "name": "Redis",
            "branches": [
              {
                "category": "product_version",
                "name": "8.8.0",
                "product": {
                  "name": "Redis Redis 8.8.0",
                  "product_id": "CSAFPID-0001"
                }
              },
              {
                "category": "product_version",
                "name": "8.2.9",
                "product": {
                  "name": "Redis Redis 8.2.9",
                  "product_id": "CSAFPID-0002"
                }
              },
              {
                "category": "product_version",
                "name": "8.4.6",
                "product": {
                  "name": "Redis Redis 8.4.6",
                  "product_id": "CSAFPID-0003"
                }
              },
              {
                "category": "product_version",
                "name": "8.6.6",
                "product": {
                  "name": "Redis Redis 8.6.6",
                  "product_id": "CSAFPID-0004"
                }
              },
              {
                "category": "product_version",
                "name": "8.8.2",
                "product": {
                  "name": "Redis Redis 8.8.2",
                  "product_id": "CSAFPID-0005"
                }
              },
              {
                "category": "product_version",
                "name": "8.10.1",
                "product": {
                  "name": "Redis Redis 8.10.1",
                  "product_id": "CSAFPID-0006"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-81934",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.",
          "title": "Description"
        },
        {
          "category": "details",
          "title": "SSVC",
          "text": "SSVCv2/E:P/A:N/T:T/2026-08-27T19:12:51Z/"
        }
      ],
      "title": "Redis TLS pending-data list use-after-free",
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ],
        "fixed": [
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "github.com",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834"
        },
        {
          "category": "external",
          "summary": "github.com",
          "url": "https://github.com/v12-security/pocs/tree/main/redis/server_ssl"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/redis/redis/8.2/00-RELEASENOTES"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/redis/redis/8.4/00-RELEASENOTES"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/redis/redis/8.6/00-RELEASENOTES"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/redis/redis/8.8/00-RELEASENOTES"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/redis/redis/8.10/00-RELEASENOTES"
        },
        {
          "category": "external",
          "summary": "raw.githubusercontent.com",
          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-239-01.json"
        },
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-81934"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Fixed in 8.2.9.",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "date": "2026-08-17T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in 8.4.6.",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834",
          "product_ids": [
            "CSAFPID-0003"
          ],
          "date": "2026-08-17T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in 8.6.6.",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834",
          "product_ids": [
            "CSAFPID-0004"
          ],
          "date": "2026-08-17T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in 8.8.2.",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834",
          "product_ids": [
            "CSAFPID-0005"
          ],
          "date": "2026-08-17T00:00:00Z"
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in 8.10.1.",
          "url": "https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834",
          "product_ids": [
            "CSAFPID-0006"
          ],
          "date": "2026-08-17T00:00:00Z"
        }
      ],
      "release_date": "2026-08-17T00:00:00Z"
    }
  ]
}