CVE-2026-56684

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.

Database specific

{
    "cwe_ids": [
        "CWE-416"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56684.json"
}

References

Affected packages

Git / github.com/valkey-io/valkey

Affected ranges

Type

GIT

Repo

https://github.com/valkey-io/valkey

Events

Introduced

2b5c7a0dbd61fd4281ef6166b7d119ba7fe7368c

Introduced

67c8683792fc9ab7e295f833478eca180c5e4691

Introduced

5018b12b0de2d2322a1bbf6b041c43740587c0f2

Introduced

c9e8005e9d0ec817e26c7db318861cb821409249

Fixed

499cfb9431c7cebec4d91f81bb4932a742a8c8ae

Fixed

23b3f6bb66c19502225a40e7aeec9e1be76456c1

Fixed

a9245aaf3286dee1795763661f0da6886acd8ef4

Fixed

a253513ac7ff5790ca119053f3c7fbca4fdaad44

Fixed

d27f9ba65a04e80d9c417112a7621fc98a56f70d

Fixed

7cd5bcb7575d750ec2de618db80da58680a10fe3

Database specific

Show details

{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.2.14"
        },
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.0.10"
        },
        {
            "introduced": "8.1.0"
        },
        {
            "fixed": "8.1.9"
        },
        {
            "introduced": "9.0.0"
        },
        {
            "fixed": "9.0.5"
        },
        {
            "introduced": "9.1.0"
        },
        {
            "fixed": "9.1.1"
        }
    ]
}

Affected versions

7.*

7.2.10

7.2.11

7.2.12

7.2.13

7.2.4

7.2.4-rc1

7.2.5

7.2.5-rc1

7.2.6

7.2.7

7.2.8

7.2.9

8.*

8.0.0

8.0.1

8.0.2

8.0.3

8.0.4

8.0.5

8.0.6

8.0.7

8.0.9

8.1.0

8.1.1

8.1.2

8.1.3

8.1.4

8.1.5

8.1.6

8.1.7

8.1.8

9.*

9.0.0

9.0.1

9.0.2

9.0.3

9.0.4

9.1

9.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56684.json"

vanir_signatures

[
    {
        "signature_type": "Function",
        "digest": {
            "function_hash": "257838141374980544053377027307065118074",
            "length": 259.0
        },
        "target": {
            "function": "tlsProcessPendingData",
            "file": "src/tls.c"
        },
        "source": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3",
        "signature_version": "v1",
        "id": "CVE-2026-56684-8065d4c1",
        "deprecated": false
    },
    {
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "205603866826886228705287116857940724719",
                "307206345666811994292734997300870204018",
                "45703851843795800979079209927880259665",
                "139938559184774966083587754178468990182",
                "299082083791088557087453839065925009656",
                "162414704591053017749326517923089046738",
                "198071868249015045736900182625827027817",
                "281756496751194748324509474716653118956",
                "126627964511863400972304111509054999908",
                "261016520391421488939166575166843385222"
            ]
        },
        "target": {
            "file": "src/tls.c"
        },
        "source": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3",
        "signature_version": "v1",
        "id": "CVE-2026-56684-8a367d24",
        "deprecated": false
    }
]

vanir_signatures_modified

"2026-08-20T10:17:16Z"