USN-8320-1: Memcached vulnerabilities

Publication date

27 May 2026

Overview

Memcached could be made to expose sensitive information over the network.


Packages

  • memcached - High-performance in-memory object caching system

Details

It was discovered that Memcached's SASL password database authentication
had a timing side channel when handling username and password data. A
remote attacker could possibly use this issue to obtain sensitive
information.

It was discovered that Memcached's SASL password database authentication
had a timing side channel when handling username and password data. A
remote attacker could possibly use this issue to obtain sensitive
information.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
26.04 LTS resolute memcached –  1.6.40-1ubuntu0.1
25.10 questing memcached –  1.6.38-1ubuntu0.1
24.04 LTS noble memcached –  1.6.24-1ubuntu0.1
22.04 LTS jammy memcached –  1.6.14-1ubuntu0.2

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