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[USN-9070-1] Hiredis vulnerability

Posted on 13 November 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-9070-1
November 12, 2026

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Hiredis could be made to crash if memory allocation failed.

Software Description:
- hiredis: minimalistic C client library for Redis

Details:

It was discovered that Hiredis did not check the return values of memory
allocation functions in some places, leading to a NULL pointer dereference.
An attacker could possibly use this issue to cause applications using
Hiredis to crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS
libhiredis0.13 0.13.3-2.2ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libhiredis0.13 0.13.3-2ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-9070-1
CVE-2020-7105

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