CVE-2022-36021: medium-severity vulnerability in redis
Redis string pattern matching can be abused to achieve Denial of Service
Published · Updated
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25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 60%
What the vendors declare (VEX)
Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.
Red HatVEX document ↗
Affected
2 products (3 components)
Red Hat OpenStack Platform 13 (Queens) · Red Hat Software Collections
no_fix_planned: Out of support scope
Fixed
Not affected
1 product (4 components) — because the vulnerable code is not present in the product
Red Hat Enterprise Linux 9
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
redis · redisRelated CVEs — redis
In the same product, most dangerous first.
CVE-2025-49844CRITICALRedis Lua Use-After-Free may lead to remote code executionEPSS 82.6%CVE-2023-36824HIGHHeap overflow in COMMAND GETKEYS and ACL evaluation in RedisEPSS 77.4%CVE-2023-22458MEDIUMInteger overflow in multiple Redis commands can lead to denial-of-serviceEPSS 72.0%CVE-2023-28425MEDIUMSpecially crafted MSETNX command can lead to denial-of-serviceEPSS 58.5%CVE-2022-24834HIGHHeap overflow issue with the Lua cjson library used by RedisEPSS 41.4%CVE-2021-32761HIGHInteger overflow issues with *BIT commands on 32-bit systemsEPSS 30.1%