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CVE-2026-82631— valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free

Quick assessment

Affected
valkey-io valkey
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 valkey-io 的 Valkey 9.1.0 版本中发现了一个安全漏洞。受影响的元素是组件“阻塞键（Blocked-on-keys）子系统”中文件 里的 函数。该操作会导致“释放后使用”（use after free）问题。攻击可来自远程。此攻击的复杂度较高，可利用性被描述为“困难”。相关的利用方式（exploit）已公开，可被用于发起攻击。修复该问题的补丁编号为 。建议应用该补丁以解决此问题。

CVSS 2.2 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-82631

Vulnerability Information
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Vulnerability Title
valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in valkey-io valkey 9.1.0. The affected element is the function handleClientsBlockedOnKey of the file src/blocked.c of the component Blocked-on-keys Subsystem. The manipulation results in use after free. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The patch is identified as b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b. Applying a patch is advised to resolve this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
valkey-io valkey 9.1.0 cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82631

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III. Intelligence Information for CVE-2026-82631

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Patches & Fixes for CVE-2026-82631 (2)

Other References for CVE-2026-82631 (5)

Other References for CVE-2026-82631 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-82631

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