========================================================================== Ubuntu Security Notice USN-8169-1 April 13, 2026
redis, lua5.1, lua-cjson, lua-bitop vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
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)
Seiya Nakata and Yudai Fujiwara discovered that Redis incorrectly handled
certain specially crafted Lua scripts. An attacker could possibly use this
issue to cause heap corruption and execute arbitrary code. This issue was only
addressed in lua-cjson on Ubuntu 20.04 LTS and Ubuntu 22.04 LTS.
(CVE-2022-24834)
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
Package Information:
https://launchpad.net/ubuntu/+source/redis/5:7.0.15-1ubuntu0.24.04.4
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