CVE-2021-32625

Name: CVE-2021-32625
Creator: NVD / NIST
Published: 2021-06-02T20:15:07.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 4.38%

Last modified Jun 17, 2026

CVE-2021-32625 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 4.38% chance of exploitation in the next 30 days.

Description

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).

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.38%

90.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redislabs	Redis	>= 6.0.0, < 6.0.14
Redislabs	Redis	>= 6.2.0, < 6.2.4
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

https://github.com/redis/redis/releases/tag/6.0.14Release Notes, Third Party Advisory
https://github.com/redis/redis/releases/tag/6.2.4Release Notes, Third Party Advisory
https://github.com/redis/redis/security/advisories/GHSA-46cp-x4x9-6pfqThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BHWOF7CBVUGDK3AN6H3BN3VNTH2TDUZZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN7INTZFE34MIQJO7WDDTIY5LIBGN6GI/
https://github.com/redis/redis/releases/tag/6.0.14Release Notes, Third Party Advisory
https://github.com/redis/redis/releases/tag/6.2.4Release Notes, Third Party Advisory
https://github.com/redis/redis/security/advisories/GHSA-46cp-x4x9-6pfqThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BHWOF7CBVUGDK3AN6H3BN3VNTH2TDUZZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN7INTZFE34MIQJO7WDDTIY5LIBGN6GI/

Timeline

Published: Jun 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32625?

How severe is CVE-2021-32625?

CVE-2021-32625 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 4.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32625?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-32625?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST