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[USN-8866-1] Redis vulnerabilities

Posted on 07 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8866-1
October 06, 2026

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

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in Redis.

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

Details:

It was discovered that Redis did not properly manage memory when handling
the TLS pending-data list. A remote attacker could possibly use this issue
to execute arbitrary code. (CVE-2026-81934)

It was discovered that Redis incorrectly handled certain inputs when
processing cluster bus packets. A remote attacker could possibly use this
issue to expose sensitive information or cause a denial of service. This
issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-92925)

Update instructions:

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

Ubuntu 26.04 LTS
redis 5:8.0.5-1ubuntu0.1
redis-sentinel 5:8.0.5-1ubuntu0.1
redis-server 5:8.0.5-1ubuntu0.1
redis-tools 5:8.0.5-1ubuntu0.1

Ubuntu 24.04 LTS
redis 5:7.0.15-1ubuntu0.24.04.5
redis-sentinel 5:7.0.15-1ubuntu0.24.04.5
redis-server 5:7.0.15-1ubuntu0.24.04.5
redis-tools 5:7.0.15-1ubuntu0.24.04.5

Ubuntu 22.04 LTS
redis 5:6.0.16-1ubuntu1.2
redis-sentinel 5:6.0.16-1ubuntu1.2
redis-server 5:6.0.16-1ubuntu1.2
redis-tools 5:6.0.16-1ubuntu1.2

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

References:
https://ubuntu.com/security/notices/USN-8866-1
CVE-2026-81934, CVE-2026-92925

Package Information:
https://launchpad.net/ubuntu/+source/redis/5:8.0.5-1ubuntu0.1
https://launchpad.net/ubuntu/+source/redis/5:7.0.15-1ubuntu0.24.04.5
https://launchpad.net/ubuntu/+source/redis/5:6.0.16-1ubuntu1.2

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