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Ubuntu 24.04 Redis Critical Lua Denial of Service Vulnerability USN-8169-1

ubuntu
Calendar Grey April 14, 2026
Dist Ubuntu Esm H88
Security advisory for Redis and Lua affected by critical issues in multiple Ubuntu LTS versions. Immediate action required.
Several security issues were fixed in Redis, lua5.1, lua-cjson, lua-bitop.

Summary

Several security issues were fixed in Redis, lua5.1, lua-cjson, lua-bitop.

Software Description:

- redis: Persistent key-value database with network interface

- lua-bitop: fast bit manipulation library for the Lua language

- lua-cjson: JSON parser/encoder for Lua language

- lua5.1: Lua is an embeddable scripting language

Details:

It was discovered that Redis incorrectly handled certain specially crafted

Lua scripts. A remote attacker could possibly use this issue to cause a

denial of service or execute arbitrary code. This issue was only addressed in

lua5.1 on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2025-49844)

It was discovered that Redis incorrectly handled certain specially crafted

Lua scripts. A remote attacker could possibly use this issue to cause a

denial of service or execute arbitrary code. This issue was only addressed in

lua-bitop on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS and in redis on Ubuntu

16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-31449)

S...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu redis Lua

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
  redis                           5:7.0.15-1ubuntu0.24.04.4
  redis-sentinel                  5:7.0.15-1ubuntu0.24.04.4
  redis-server                    5:7.0.15-1ubuntu0.24.04.4
  redis-tools                     5:7.0.15-1ubuntu0.24.04.4

Ubuntu 22.04 LTS
  liblua5.1-0                     5.1.5-8.1ubuntu0.22.04.1~esm1
                                  Available with Ubuntu Pro
  liblua5.1-0-dev                 5.1.5-8.1ubuntu0.22.04.1~esm1
                                  Available with Ubuntu Pro
  liblua5.1-bitop-dev             1.0.2-5ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  liblua5.1-bitop0                1.0.2-5ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  lua-bitop                       1.0.2-5ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  lua-bitop-dev                   1.0.2-5ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  lua-cjson                       2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  lua-cjson-dev                   2.1.0+dfsg-2.1ubuntu0.22.04.1~esm2
                                  Available with Ubuntu Pro
  lua5.1                          5.1.5-8.1ubuntu0.22.04.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  liblua5.1-0                     5.1.5-8.1ubuntu0.20.04.1~esm1
                                  Available with Ubuntu Pro
  liblua5.1-0-dev                 5.1.5-8.1ubuntu0.20.04.1~esm1
                                  Available with Ubuntu Pro
  liblua5.1-bitop-dev             1.0.2-5ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  liblua5.1-bitop0                1.0.2-5ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  lua-bitop                       1.0.2-5ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  lua-bitop-dev                   1.0.2-5ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  lua-cjson                       2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  lua-cjson-dev                   2.1.0+dfsg-2.1ubuntu0.20.04.1~esm2
                                  Available with Ubuntu Pro
  lua5.1                          5.1.5-8.1ubuntu0.20.04.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  redis                           5:4.0.9-1ubuntu0.2+esm7
                                  Available with Ubuntu Pro
  redis-sentinel                  5:4.0.9-1ubuntu0.2+esm7
                                  Available with Ubuntu Pro
  redis-server                    5:4.0.9-1ubuntu0.2+esm7
                                  Available with Ubuntu Pro
  redis-tools                     5:4.0.9-1ubuntu0.2+esm7
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  redis-sentinel                  2:3.0.6-1ubuntu0.4+esm5
                                  Available with Ubuntu Pro
  redis-server                    2:3.0.6-1ubuntu0.4+esm5
                                  Available with Ubuntu Pro
  redis-tools                     2:3.0.6-1ubuntu0.4+esm5
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8169-1

CVE-2022-24834, CVE-2024-31449, CVE-2025-49844

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8169-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu redis Lua

Package Information

https://launchpad.net/ubuntu/+source/redis/5:7.0.15-1ubuntu0.24.04.4

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