# CVE-2021-32672: redis: Redis is an open source, in-memory database that persists on disk

CVE-2021-32672 is fixed in 4 products on 1 platform, first by redis 5:4.0.9-1ubuntu0.2+esm3, released October 4, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-32672
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0169
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 4, 2021

## Description

Redis is an open source, in-memory database that persists on disk. When using the Redis Lua Debugger, users can send malformed requests that cause the debugger’s protocol parser to read data beyond the actual buffer. This issue affects all versions of Redis with Lua debugging support (3.2 or newer). The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | redis Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm3 | [redis 5:4.0.9-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-5-4.0.9-1ubuntu0.2-esm3.md) | Oct 4, 2021 |
| Linux | redis Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm1 | [redis 5:5.0.7-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-5-5.0.7-2ubuntu0.1-esm1.md) | Oct 4, 2021 |
| Linux | redis-sentinel Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm3 | [redis-sentinel 5:4.0.9-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-sentinel-5-4.0.9-1ubuntu0.2-esm3.md) | Oct 4, 2021 |
| Linux | redis-sentinel Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm1 | [redis-sentinel 5:5.0.7-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-sentinel-5-5.0.7-2ubuntu0.1-esm1.md) | Oct 4, 2021 |
| Linux | redis-server Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm3 | [redis-server 5:4.0.9-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-server-5-4.0.9-1ubuntu0.2-esm3.md) | Oct 4, 2021 |
| Linux | redis-server Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm1 | [redis-server 5:5.0.7-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-server-5-5.0.7-2ubuntu0.1-esm1.md) | Oct 4, 2021 |
| Linux | redis-tools Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm3 | [redis-tools 5:4.0.9-1ubuntu0.2+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-tools-5-4.0.9-1ubuntu0.2-esm3.md) | Oct 4, 2021 |
| Linux | redis-tools Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm1 | [redis-tools 5:5.0.7-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-tools-5-5.0.7-2ubuntu0.1-esm1.md) | Oct 4, 2021 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.