CVE-2022-36021
MediumAuthenticated 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.
Published Mar 1, 2023 · Updated Sep 8, 2026 · Also known as BIT-keydb-2022-36021, BIT-redis-2022-36021, BIT-valkey-2022-36021, DEBIAN-CVE-2022-36021, DLA-3361-1, GHSA-jr7j-rfj5-8xqv, SUSE-SU-2023:0693-1, SUSE-SU-2023:0694-1, SUSE-SU-2023:2122-1, UBUNTU-CVE-2022-36021
Key Facts
Patch immediately- CVE-2022-36021 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Redis, keydb (bitnami), valkey (bitnami) and 8 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 60% probability of exploitation in the next 30 days.
- Fixed versions are available, including keydb 6.0.18, keydb 6.2.11, keydb 7.0.9.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
60%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-36021 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Affected Products
78 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| RedisRedis | >= < 6.0.18 | 6.0.18 |
| keydbbitnami | See advisory | 6.0.18 |
| valkeybitnami | See advisory | 6.0.18 |
| redis6-develamazon | See advisory | 6.2.11-1.amzn2023.0.1 |
| redis6amazon | See advisory | 6.2.11-1.amzn2023.0.1 |
Patched Releases
keydb
6.0.18, 6.2.11, 7.0.9
Redis
2:2.8.4-2ubuntu0.2+esm3, 2:3.0.6-1ubuntu0.4+esm2, 5:4.0.9-1ubuntu0.2+esm4, 5:5.0.14-1+deb10u3, 5:5.0.7-2ubuntu0.1+esm2, 5:6.0.16-1+deb11u3, 5:6.0.16-1ubuntu1+esm1, 5:7.0.9-1, 6.0.14-150200.6.20.1, 6.0.18, 6.2.11, 6.2.11-1, 6.2.17-1.0.1.module+el8.10.0+90491+f9002f77, 6.2.17-1.module_el8.10.0+3946+3de613d5, 6.2.17-1.module+el8.10.0+1923+5b85c6a7, 6.2.6-150400.3.16.1, 6.2.6-150400.3.19.1, 6.2.7-4.ph3, 7.0.0-7.ph4, 7.0.8-2.1, 7.0.9
redis-devel
6.2.17-1.0.1.module+el8.10.0+90491+f9002f77
redis-doc
6.2.17-1.0.1.module+el8.10.0+90491+f9002f77
redis:6
8100020250113083959.489197e6
redis6
6.2.11-1.amzn2023.0.1
redis6-devel
6.2.11-1.amzn2023.0.1
redis6-doc
6.2.11-1.amzn2023.0.1
redis7
7.0.8-150500.3.3.1
valkey
6.0.18, 6.2.11, 7.0.9
Timeline
Publicly disclosed
Mar 1, 2023
Last updated
Sep 8, 2026
Weakness Type
- CWE-190 Integer Overflow or Wraparound
- CWE-407 Inefficient Algorithmic Complexity
References
- advisoryRHSA-2025:0595
- advisoryhttps://bugzilla.suse.com/1208235
- advisoryhttps://bugzilla.suse.com/1208790
- advisoryhttps://bugzilla.suse.com/1208793
- advisoryhttps://bugzilla.suse.com/1209528
FAQ
Common Questions.
Redis is an in-memory database that persists on disk.
Affected: Redis versions >= < 6.0.18; keydb (bitnami); valkey (bitnami), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including keydb 6.0.18, keydb 6.2.11, keydb 7.0.9.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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