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CVE-2026-86227— valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds

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.

Valkey是Valkey组织开源的一个灵活的分布式键值数据库。 Valkey 9.0.5及之前版本和9.1.1及之前版本存在缓冲区错误漏洞，该漏洞源于对src/kvstore.c文件中kvstoreGetHashtable函数参数didx的操作，导致越界读取，可能造成拒绝服务。

CVSS 3.1 · Low EPSS 0.52% · P44

Possible ATT&CK Techniques 1 AI

T1531 · Account Access Removal

Affected Version Matrix 8

VendorProduct Version RangeStatus
valkey-io valkey 9.0.0 affected
9.0.1 affected
9.0.2 affected
9.0.3 affected
9.0.4 affected
9.0.5 affected
9.1.0 affected
9.1.1 affected
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I. Basic Information for CVE-2026-86227

Vulnerability Information
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Vulnerability Title
valkey-io valkey kvstore.c kvstoreGetHashtable out-of-bounds
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 4691888e7fab3df128f0bde5750c9fde2ae552fa. To fix this issue, it is recommended to deploy a patch. Exploitation requires cluster mode plus attacker-controlled dump.rdb at startup (data-dir write access, replication feed, or a stored crafted RDB) - an attacker-position DoS at boot, not network pre-auth. The issue report was closed stating it "is worth fixing for the sake of memory safety… but I don't think it meets our bar for a security disclosure."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Valkey 缓冲区错误漏洞
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 9.0.5及之前版本和9.1.1及之前版本存在缓冲区错误漏洞，该漏洞源于对src/kvstore.c文件中kvstoreGetHashtable函数参数didx的操作，导致越界读取，可能造成拒绝服务。
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 9.0.0 cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86227

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III. Intelligence Information for CVE-2026-86227

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Patches & Fixes for CVE-2026-86227 (2)

Vendor Advisories for CVE-2026-86227 (1)

Proof of Concept for CVE-2026-86227 (1)

Other References for CVE-2026-86227 (3)

Other References for CVE-2026-86227 (1)

IV. Related Vulnerabilities

Same product: valkey
Same vendor: valkey-io
Same weakness: CWE-125