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CVE-2026-56684— Valkey: TLS pending-data processing use-after-free may allow remote code execution

Quick assessment

Affected
valkey-io valkey
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Valkey是Valkey组织开源的一个灵活的分布式键值数据库。 Valkey 7.2.14之前版本、8.0.10之前版本、8.1.9之前版本、9.0.5之前版本和9.1.1之前版本存在资源管理错误漏洞，该漏洞源于tlsProcessPendingData函数在遍历pending_list时，已认证客户端可触发CLIENT KILL，导致connTLSClose删除迭代器缓存的next节点，产生释放后重用，可能导致服务器崩溃或远程代码执行。

CVSS 7.5 · High EPSS 0.52% · P44

Affected Version Matrix 5

VendorProduct Version RangeStatus
valkey-io valkey < 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 affected
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I. Basic Information for CVE-2026-56684

Vulnerability Information
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Vulnerability Title
Valkey: TLS pending-data processing use-after-free may allow remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Valkey 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Valkey是Valkey组织开源的一个灵活的分布式键值数据库。 Valkey 7.2.14之前版本、8.0.10之前版本、8.1.9之前版本、9.0.5之前版本和9.1.1之前版本存在资源管理错误漏洞，该漏洞源于tlsProcessPendingData函数在遍历pending_list时，已认证客户端可触发CLIENT KILL，导致connTLSClose删除迭代器缓存的next节点，产生释放后重用，可能导致服务器崩溃或远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
valkey-io valkey < 7.2.14 -

II. Public POCs for CVE-2026-56684

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7961 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-56684

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Patches & Fixes for CVE-2026-56684 (3)

Vendor Advisories for CVE-2026-56684 (1)

Vendor Pages for CVE-2026-56684 (4)

IV. Related Vulnerabilities

Same product: valkey
Same vendor: valkey-io
Same weakness: CWE-416