CVE-2021-32628— Vulnerability in handling large ziplists
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I. Basic Information for CVE-2021-32628
Vulnerability Information
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Vulnerability Title
Vulnerability in handling large ziplists
Source: NVD (National Vulnerability Database)
Vulnerability Description
Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the ziplist data structure used by all versions of Redis can be exploited to corrupt the heap and potentially result with remote code execution. The vulnerability involves modifying the default ziplist configuration parameters (hash-max-ziplist-entries, hash-max-ziplist-value, zset-max-ziplist-entries or zset-max-ziplist-value) to a very large value, and then constructing specially crafted commands to create very large ziplists. The problem is fixed in Redis versions 6.2.6, 6.0.16, 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the above configuration parameters. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
Redis Labs Redis 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Redis Labs Redis是美国Redis Labs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 存在输入验证错误漏洞，该漏洞可导致远程代码执行。
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
II. Public POCs for CVE-2021-32628
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8093 chars
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III. Intelligence Information for CVE-2021-32628
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Patches & Fixes for CVE-2021-32628 (1)
Vendor Advisories for CVE-2021-32628 (5)
- https://security.netapp.com/advisory/ntap-20211104-0003/x_refsource_CONFIRM
- https://github.com/redis/redis/security/advisories/GHSA-vw22-qm3h-49prx_refsource_CONFIRM
- https://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
Mailing List Discussions for CVE-2021-32628 (3)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/vendor-advisoryx_refsource_FEDORA
Same Patch Batch · redis · 2021-10-04 · 9 CVEs total
| CVE-2021-32765 | 8.8 HIGH | Integer Overflow to Buffer Overflow in Hiredis |
| CVE-2021-32626 | 7.5 HIGH | Lua scripts can overflow the heap-based Lua stack in Redis |
| CVE-2021-32627 | 7.5 HIGH | Integer overflow issue with Streams in Redis |
| CVE-2021-32675 | 7.5 HIGH | DoS vulnerability in Redis |
| CVE-2021-32687 | 7.5 HIGH | Integer overflow issue with intsets in Redis |
| CVE-2021-32762 | 7.5 HIGH | Integer overflow that can lead to heap overflow in redis-cli, redis-sentinel on some platf |
| CVE-2021-41099 | 7.5 HIGH | Integer overflow issue with strings in Redis |
| CVE-2021-32672 | 5.3 MEDIUM | Vulnerability in Lua Debugger in Redis |
IV. Related Vulnerabilities
Same product: redis
- CVE-2026-25243
redis-server RESTORE invalid memory access may allow remote - CVE-2026-23631
redis-server Lua use-after-free may allow remote code execut - CVE-2026-23479
redis-server use-after-free in unblock client flow may allow - CVE-2025-62507
Redis: Bug in XACKDEL may lead to stack overflow and potenti - CVE-2025-49844
Redis Lua Use-After-Free may lead to remote code execution
Same vendor: redis
- CVE-2026-25243
redis-server RESTORE invalid memory access may allow remote - CVE-2026-23631
redis-server Lua use-after-free may allow remote code execut - CVE-2026-23479
redis-server use-after-free in unblock client flow may allow - CVE-2025-62507
Redis: Bug in XACKDEL may lead to stack overflow and potenti - CVE-2025-49844
Redis Lua Use-After-Free may lead to remote code execution
Same weakness: CWE-190
- CVE-2026-24214
NVIDIA Triton Inference Server 输入验证错误漏洞 - CVE-2026-24210
NVIDIA Triton Inference Server 输入验证错误漏洞 - CVE-2026-43618
Rsync < 3.4.3 Integer Overflow Information Disclosure - CVE-2026-33642
Kitty has a Heap Buffer Over-Read/Write via Integer Overflow - CVE-2026-27781
kernel_liteos_a has an integer overflow vulnerability
V. Comments for CVE-2021-32628
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