CVE-2021-32625highCWE-680

CVE-2021-32625: high-severity vulnerability in redis

Redis vulnerability in STRALGO LCS on 32-bit systems

Published · Updated

Follow this CVE+ Monitor redis+ Monitor redis

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 4.1%
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer, could be exploited using the STRALGO LCS command to corrupt the heap and potentially result with remote code execution. This is a result of an incomplete fix by CVE-2021-29477. The problem is fixed in version 6.2.4 and 6.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the STRALGO LCS command. On 64 bit systems which have the fixes of CVE-2021-29477 (6.2.3 or 6.0.13), it is sufficient to make sure that the proto-max-bulk-len config parameter is smaller than 2GB (default is 512MB).
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
redis · redis
Related 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-2022-36021MEDIUMRedis string pattern matching can be abused to achieve Denial of ServiceEPSS 59.8%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%