CVE-2021-29477

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. The problem is fixed in version 6.2.3 and 6.0.13. 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.

• CWE-190
• CWE-190

• https://github.com/redis/redis/security/advisories/GHSA-vqxj-26vj-996gThird 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/BPWBIZXA67JFIB63W2CNVVILCGIC2ME5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZJ6JGQ2ETZB2DWTQSGCOGG7EF3ILV4V/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN7INTZFE34MIQJO7WDDTIY5LIBGN6GI/
• https://redis.io/Product
• https://security.gentoo.org/glsa/202107-20Third Party Advisory
• https://github.com/redis/redis/security/advisories/GHSA-vqxj-26vj-996gThird 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/BPWBIZXA67JFIB63W2CNVVILCGIC2ME5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZJ6JGQ2ETZB2DWTQSGCOGG7EF3ILV4V/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SN7INTZFE34MIQJO7WDDTIY5LIBGN6GI/
• https://redis.io/Product
• https://security.gentoo.org/glsa/202107-20Third Party Advisory

Published

May 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-29471Synapse is a Matrix reference homeserver written in python (…5.3
• CVE-2021-29472Composer is a dependency manager for PHP. URLs for Mercurial…8.8
• CVE-2021-29473Exiv2 is a C++ library and a command-line utility to read, w…2.5
• CVE-2021-29474HedgeDoc (formerly known as CodiMD) is an open-source collab…5.8
• CVE-2021-29475HedgeDoc (formerly known as CodiMD) is an open-source collab…10
• CVE-2021-29476Requests is a HTTP library written in PHP. Requests mishandl…9.8
• CVE-2021-29478Redis is an open source (BSD licensed), in-memory data struc…8.8
• CVE-2021-29479Ratpack is a toolkit for creating web applications. In versi…6.1
• CVE-2021-29480Ratpack is a toolkit for creating web applications. In versi…3.1
• CVE-2021-29481Ratpack is a toolkit for creating web applications. In versi…7.5
• CVE-2021-29482xz is a compression and decompression library focusing on th…7.5
• CVE-2021-29483ManageWiki is an extension to the MediaWiki project. The 'wi…7.5