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CVE-2026-23479— redis-server use-after-free in unblock client flow may allow remote code execution

Quick assessment

Affected
redis redis
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.

Redis是美国Redis公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 7.2.0至8.6.3版本存在资源管理错误漏洞，该漏洞源于取消阻塞客户端流程未处理重新执行阻塞命令时processCommandAndResetClient的错误返回，若阻塞客户端在此流程中被驱逐，可能导致释放后重用，进而导致远程代码执行。

AI Predicted 7.5 Difficulty: Easy EPSS 1.36% · P70

Affected Version Matrix 1

VendorProduct Version RangeStatus
redis redis >= 7.2.0, < 8.6.3 affected
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I. Basic Information for CVE-2026-23479

Vulnerability Information
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Vulnerability Title
redis-server use-after-free in unblock client flow may allow remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Redis 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Redis是美国Redis公司的一套开源的使用ANSI C编写、支持网络、可基于内存亦可持久化的日志型、键值（Key-Value）存储数据库，并提供多种语言的API。 Redis 7.2.0至8.6.3版本存在资源管理错误漏洞，该漏洞源于取消阻塞客户端流程未处理重新执行阻塞命令时processCommandAndResetClient的错误返回，若阻塞客户端在此流程中被驱逐，可能导致释放后重用，进而导致远程代码执行。
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
redis redis >= 7.2.0, < 8.6.3 -

II. Public POCs for CVE-2026-23479

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III. Intelligence Information for CVE-2026-23479

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Vendor Advisories for CVE-2026-23479 (1)

Vendor Pages for CVE-2026-23479 (1)

Same Patch Batch · redis · 2026-05-05 · 3 CVEs total

CVE-2026-25243 redis-server RESTORE invalid memory access may allow remote code execution
CVE-2026-23631 redis-server Lua use-after-free may allow remote code execution

IV. Related Vulnerabilities

Same product: redis
Same vendor: redis
Same weakness: CWE-416

V. Comments for CVE-2026-23479

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