Vulnerability-Lookup

ubuntu-cve-2026-56684

Vulnerability from osv_ubuntu

Published

2026-08-18 15:16

Modified

2026-09-02 16:20

Summary

Details

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.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-56684	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-56684	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "valkey-redis-compat",
            "binary_version": "7.2.13+dfsg1-0ubuntu0.1"
          },
          {
            "binary_name": "valkey-sentinel",
            "binary_version": "7.2.13+dfsg1-0ubuntu0.1"
          },
          {
            "binary_name": "valkey-server",
            "binary_version": "7.2.13+dfsg1-0ubuntu0.1"
          },
          {
            "binary_name": "valkey-tools",
            "binary_version": "7.2.13+dfsg1-0ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "valkey",
        "purl": "pkg:deb/ubuntu/valkey@7.2.13+dfsg1-0ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.2.5+dfsg1-2ubuntu4~24.04.1",
        "7.2.7+dfsg1-0ubuntu0.24.04.1",
        "7.2.8+dfsg1-0ubuntu0.24.04.1",
        "7.2.8+dfsg1-0ubuntu0.24.04.2",
        "7.2.8+dfsg1-0ubuntu0.24.04.3",
        "7.2.10+dfsg1-0ubuntu0.1",
        "7.2.11+dfsg1-0ubuntu0.1",
        "7.2.11+dfsg1-0ubuntu0.2",
        "7.2.12+dfsg1-0ubuntu0.1",
        "7.2.13+dfsg1-0ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "valkey-sentinel",
            "binary_version": "9.0.4-0ubuntu0.1"
          },
          {
            "binary_name": "valkey-server",
            "binary_version": "9.0.4-0ubuntu0.1"
          },
          {
            "binary_name": "valkey-tools",
            "binary_version": "9.0.4-0ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "valkey",
        "purl": "pkg:deb/ubuntu/valkey@9.0.4-0ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.1.3+dfsg1-0ubuntu2",
        "8.1.4+dfsg1-0ubuntu1",
        "9.0.2-0ubuntu1",
        "9.0.3-0ubuntu1",
        "9.0.3-0ubuntu2",
        "9.0.4-0ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "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": "UBUNTU-CVE-2026-56684",
  "modified": "2026-09-02T16:20:02Z",
  "published": "2026-08-18T15:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-56684"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-56684"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-56684"
  ]
}

CVE-2026-56684 (GCVE-0-2026-56684)

Vulnerability from cvelistv5 – Published: 2026-08-18 14:19 – Updated: 2026-08-19 03:56

Title

Valkey: TLS pending-data processing use-after-free may allow remote code execution

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 00:00 UTC

CWE

CWE-416 - Use After Free

Assigner

GitHub_M mitre root

References

8 references

URL	Tags
https://github.com/valkey-io/valkey/security/advi…	x_refsource_CONFIRM
https://github.com/valkey-io/valkey/pull/4234	x_refsource_MISC
https://github.com/valkey-io/valkey/commit/7cd5bc…	x_refsource_MISC
https://github.com/valkey-io/valkey/releases/tag/7.2.14	x_refsource_MISC
https://github.com/valkey-io/valkey/releases/tag/8.0.10	x_refsource_MISC
https://github.com/valkey-io/valkey/releases/tag/8.1.9	x_refsource_MISC
https://github.com/valkey-io/valkey/releases/tag/9.0.5	x_refsource_MISC
https://github.com/valkey-io/valkey/releases/tag/9.1.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
valkey-io	valkey	Affected: < 7.2.14 Affected: >= 8.0.0, < 8.0.10 Affected: >= 8.1.0, < 8.1.9 Affected: >= 9.0.0, < 9.0.5 Affected: >= 9.1.0, < 9.1.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56684",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-19T03:56:13.565Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T14:19:51.047Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh"
        },
        {
          "name": "https://github.com/valkey-io/valkey/pull/4234",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/pull/4234"
        },
        {
          "name": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3"
        },
        {
          "name": "https://github.com/valkey-io/valkey/releases/tag/7.2.14",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14"
        },
        {
          "name": "https://github.com/valkey-io/valkey/releases/tag/8.0.10",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10"
        },
        {
          "name": "https://github.com/valkey-io/valkey/releases/tag/8.1.9",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9"
        },
        {
          "name": "https://github.com/valkey-io/valkey/releases/tag/9.0.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5"
        },
        {
          "name": "https://github.com/valkey-io/valkey/releases/tag/9.1.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1"
        }
      ],
      "source": {
        "advisory": "GHSA-53mc-f3m3-99vh",
        "discovery": "UNKNOWN"
      },
      "title": "Valkey: TLS pending-data processing use-after-free may allow remote code execution"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-56684",
    "datePublished": "2026-08-18T14:19:51.047Z",
    "dateReserved": "2026-06-22T16:39:01.044Z",
    "dateUpdated": "2026-08-19T03:56:13.565Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.