# CVE-2022-36021: redis: Redis is an in-memory database that persists on disk

CVE-2022-36021 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2022-36021, released March 1, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-36021
- Priority: High
- CVSS: 7.0 (Medium)
- EPSS: 0.5977
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 1, 2023

## Description

Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | redis Debian 12.15 (bookworm) | 5:7.0.9-1 | [DEBIAN-CVE-2022-36021](https://patchblox.com/security/data/fix/linux/debian-cve-2022-36021.md) | Mar 1, 2023 |
| Linux | redis Debian 13.5 (trixie) | 5:7.0.9-1 | [DEBIAN-CVE-2022-36021](https://patchblox.com/security/data/fix/linux/debian-cve-2022-36021.md) | Mar 1, 2023 |
| Linux | redis Debian 14 | 5:7.0.9-1 | [DEBIAN-CVE-2022-36021](https://patchblox.com/security/data/fix/linux/debian-cve-2022-36021.md) | Mar 1, 2023 |
| Linux | redis RHEL 8 | 0:6.2.17-1.module+el8.10.0+22680+748527fd | [RHSA-2025:0595](https://patchblox.com/security/data/fix/linux/rhsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm4 | [redis 5:4.0.9-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-5-4.0.9-1ubuntu0.2-esm4.md) | Oct 18, 2023 |
| Linux | redis Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm2 | [redis 5:5.0.7-2ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-5-5.0.7-2ubuntu0.1-esm2.md) | Oct 18, 2023 |
| Linux | redis Ubuntu 22.04.1 LTS (jammy) | 5:6.0.16-1ubuntu1+esm1 | [redis 5:6.0.16-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-redis-5-6.0.16-1ubuntu1-esm1.md) | Oct 18, 2023 |
| Linux | redis almalinux 8 | 6.2.17-1.module_el8.10.0+3946+3de613d5 | [ALSA-2025:0595](https://patchblox.com/security/data/fix/linux/alsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis ol 8 | 0:6.2.17-1.0.1.module+el8.10.0+90491+f9002f77 | [ELSA-2025-0595](https://patchblox.com/security/data/fix/linux/elsa-2025-0595.md) | Jan 23, 2025 |
| Linux | redis rocky 8 | 0:6.2.17-1.module+el8.10.0+1923+5b85c6a7 | [RLSA-2025:0595](https://patchblox.com/security/data/fix/linux/rlsa-2025-0595.md) | Feb 13, 2025 |
| Linux | redis-devel RHEL 8 | 0:6.2.17-1.module+el8.10.0+22680+748527fd | [RHSA-2025:0595](https://patchblox.com/security/data/fix/linux/rhsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis-devel almalinux 8 | 6.2.17-1.module_el8.10.0+3946+3de613d5 | [ALSA-2025:0595](https://patchblox.com/security/data/fix/linux/alsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis-devel ol 8 | 0:6.2.17-1.0.1.module+el8.10.0+90491+f9002f77 | [ELSA-2025-0595](https://patchblox.com/security/data/fix/linux/elsa-2025-0595.md) | Jan 23, 2025 |
| Linux | redis-doc RHEL 8 | 0:6.2.17-1.module+el8.10.0+22680+748527fd | [RHSA-2025:0595](https://patchblox.com/security/data/fix/linux/rhsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis-doc almalinux 8 | 6.2.17-1.module_el8.10.0+3946+3de613d5 | [ALSA-2025:0595](https://patchblox.com/security/data/fix/linux/alsa-2025-0595.md) | Jan 22, 2025 |
| Linux | redis-doc ol 8 | 0:6.2.17-1.0.1.module+el8.10.0+90491+f9002f77 | [ELSA-2025-0595](https://patchblox.com/security/data/fix/linux/elsa-2025-0595.md) | Jan 23, 2025 |
| Linux | redis-sentinel Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm4 | [redis-sentinel 5:4.0.9-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-sentinel-5-4.0.9-1ubuntu0.2-esm4.md) | Oct 18, 2023 |
| Linux | redis-sentinel Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm2 | [redis-sentinel 5:5.0.7-2ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-sentinel-5-5.0.7-2ubuntu0.1-esm2.md) | Oct 18, 2023 |
| Linux | redis-sentinel Ubuntu 22.04.1 LTS (jammy) | 5:6.0.16-1ubuntu1+esm1 | [redis-sentinel 5:6.0.16-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-redis-sentinel-5-6.0.16-1ubuntu1-esm1.md) | Oct 18, 2023 |
| Linux | redis-server Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm4 | [redis-server 5:4.0.9-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-server-5-4.0.9-1ubuntu0.2-esm4.md) | Oct 18, 2023 |
| Linux | redis-server Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm2 | [redis-server 5:5.0.7-2ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-server-5-5.0.7-2ubuntu0.1-esm2.md) | Oct 18, 2023 |
| Linux | redis-server Ubuntu 22.04.1 LTS (jammy) | 5:6.0.16-1ubuntu1+esm1 | [redis-server 5:6.0.16-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-redis-server-5-6.0.16-1ubuntu1-esm1.md) | Oct 18, 2023 |
| Linux | redis-tools Ubuntu 18.04.6 LTS (bionic) | 5:4.0.9-1ubuntu0.2+esm4 | [redis-tools 5:4.0.9-1ubuntu0.2+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-redis-tools-5-4.0.9-1ubuntu0.2-esm4.md) | Oct 18, 2023 |
| Linux | redis-tools Ubuntu 20.04 LTS (focal) | 5:5.0.7-2ubuntu0.1+esm2 | [redis-tools 5:5.0.7-2ubuntu0.1+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-redis-tools-5-5.0.7-2ubuntu0.1-esm2.md) | Oct 18, 2023 |
| Linux | redis-tools Ubuntu 22.04.1 LTS (jammy) | 5:6.0.16-1ubuntu1+esm1 | [redis-tools 5:6.0.16-1ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-redis-tools-5-6.0.16-1ubuntu1-esm1.md) | Oct 18, 2023 |
| Linux | redis6 amzn 2023 | 6.2.11-1.amzn2023.0.1 | [ALAS2023-2023-154](https://patchblox.com/security/data/fix/linux/alas2023-2023-154.md) | Mar 30, 2023 |
| Linux | redis6-debuginfo amzn 2023 | 6.2.11-1.amzn2023.0.1 | [ALAS2023-2023-154](https://patchblox.com/security/data/fix/linux/alas2023-2023-154.md) | Mar 30, 2023 |
| Linux | redis6-debugsource amzn 2023 | 6.2.11-1.amzn2023.0.1 | [ALAS2023-2023-154](https://patchblox.com/security/data/fix/linux/alas2023-2023-154.md) | Mar 30, 2023 |
| Linux | redis6-devel amzn 2023 | 6.2.11-1.amzn2023.0.1 | [ALAS2023-2023-154](https://patchblox.com/security/data/fix/linux/alas2023-2023-154.md) | Mar 30, 2023 |
| Linux | redis6-doc amzn 2023 | 6.2.11-1.amzn2023.0.1 | [ALAS2023-2023-154](https://patchblox.com/security/data/fix/linux/alas2023-2023-154.md) | Mar 30, 2023 |

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