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[USN-7824-1] Redis vulnerability

Posted on 16 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7824-1
October 15, 2025

redis vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Redis could be made to crash or run programs if it received specially
crafted network traffic from an authenticated user.

Software Description:
- redis: Persistent key-value database with network interface

Details:

Benny Isaacs, Nir Brakha, and Sagi Tzadik discovered that Redis incorrectly
handled memory when running Lua scripts. An authenticated attacker could
use this vulnerability to trigger a use-after-free condition, and
potentially achieve remote code execution on the Redis server.

Update instructions:

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

Ubuntu 25.10
redis 5:8.0.2-3ubuntu0.25.10.1
redis-sentinel 5:8.0.2-3ubuntu0.25.10.1
redis-server 5:8.0.2-3ubuntu0.25.10.1
redis-tools 5:8.0.2-3ubuntu0.25.10.1

Ubuntu 25.04
redis 5:7.0.15-3ubuntu0.1
redis-sentinel 5:7.0.15-3ubuntu0.1
redis-server 5:7.0.15-3ubuntu0.1
redis-tools 5:7.0.15-3ubuntu0.1

Ubuntu 24.04 LTS
redis 5:7.0.15-1ubuntu0.24.04.2
redis-sentinel 5:7.0.15-1ubuntu0.24.04.2
redis-server 5:7.0.15-1ubuntu0.24.04.2
redis-tools 5:7.0.15-1ubuntu0.24.04.2

Ubuntu 20.04 LTS
redis 5:5.0.7-2ubuntu0.1+esm4
Available with Ubuntu Pro
redis-sentinel 5:5.0.7-2ubuntu0.1+esm4
Available with Ubuntu Pro
redis-server 5:5.0.7-2ubuntu0.1+esm4
Available with Ubuntu Pro
redis-tools 5:5.0.7-2ubuntu0.1+esm4
Available with Ubuntu Pro

Ubuntu 18.04 LTS
redis 5:4.0.9-1ubuntu0.2+esm6
Available with Ubuntu Pro
redis-sentinel 5:4.0.9-1ubuntu0.2+esm6
Available with Ubuntu Pro
redis-server 5:4.0.9-1ubuntu0.2+esm6
Available with Ubuntu Pro
redis-tools 5:4.0.9-1ubuntu0.2+esm6
Available with Ubuntu Pro

Ubuntu 16.04 LTS
redis-sentinel 2:3.0.6-1ubuntu0.4+esm4
Available with Ubuntu Pro
redis-server 2:3.0.6-1ubuntu0.4+esm4
Available with Ubuntu Pro
redis-tools 2:3.0.6-1ubuntu0.4+esm4
Available with Ubuntu Pro

Ubuntu 14.04 LTS
redis-server 2:2.8.4-2ubuntu0.2+esm5
Available with Ubuntu Pro
redis-tools 2:2.8.4-2ubuntu0.2+esm5
Available with Ubuntu Pro

After a standard system update you need to restart Redis to make all the
necessary changes.

References:
https://ubuntu.com/security/notices/USN-7824-1
CVE-2025-49844

Package Information:
https://launchpad.net/ubuntu/+source/redis/5:8.0.2-3ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/redis/5:7.0.15-3ubuntu0.1
https://launchpad.net/ubuntu/+source/redis/5:7.0.15-1ubuntu0.24.04.2

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