Tenable Security Center 2026 Release Notes

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Tenable Security Center Patch 202601.1 (2026-01-06)

Apply this patch to Tenable Security Center installations running the following versions:

Tenable Security Center 6.7.x, 6.6.0, and 6.5.1 on Oracle Linux 8 or later.
Tenable Security Center 6.7.x, 6.6.0, and 6.5.1 on Red Hat Enterprise Linux 8 or later.
Tenable Security Center 6.7.x, 6.6.0, and 6.5.1 on Tenable Core.
Tenable Security Center 6.7.x and 6.6.x on Tenable Enclave Security.

This patch updates the PHP configuration to increase the memory_limit to 4GB. This change prevents potential 255 error status failures during Tenable Security Center feed updates caused by PHP memory exhaustion.

Note: If you are running a Tenable Security Center version earlier than 6.5.1, you must upgrade to a supported version before applying this patch, or manually update your configuration.

Note: Tenable Security Center requires at least 8GB of RAM on the host operating system to function.

Caution: If you do not apply this patch or manually update the configuration, Tenable Security Center feed updates fail. This failure prevents updates to the following elements:

Asset List Templates
Report Templates
Dashboard Templates
Audit File Templates
Vulnerability Intelligence and CVE Search data

Failure to process feeds also increases disk space usage on Tenable Security Center.

Steps to Apply Patch

Apply the patch to a standalone Tenable Security Center or Tenable Core + Tenable Security Center:

Download the patch from the Tenable Security Center Downloads page to Tenable Security Center. You can save the files in any location (e.g., /tmp).
Access the command line as a user with root-level permissions.
Run the following command to untar the patch file, where [patch file name] is the name of the .tgz patch file you downloaded:

tar zxf [patch file name]
Run the following command to change the directory to the extracted directory, where [directory] is the extracted directory:

cd [directory]
Run the following command to begin the installation:

sh ./install.sh

The installation begins and Tenable Security Center stops.
After the installation finishes, you must restart Tenable Security Center.

What to do next:

(Optional) Confirm the patch successfully applied to Tenable Security Center, as described in the knowledge base article.

Steps to Apply Patch to Tenable Security Center on Tenable Enclave Security

Apply the patch to a Tenable Security Center running on Tenable Enclave Security:

Download the patch from the Tenable Security Center Downloads page to Tenable Security Center. You can save the files in any location (e.g., /tmp).
Copy the patch file to the Tenable Security Center pod of your namespace, where [patch file name] is the name of the .tgz patch file you downloaded:

kubectl cp [patch file name] [namespace]/[sc-pod]:[patch file name]
Log in to the Tenable Enclave Security runtime container with the following command:

kubectl exec -it tenable-security-center-0 -n [namespace] -- /bin/sh
Run the following command to untar the patch file:

tar zxf [patch file name]
Run the following command to change the directory to the extracted directory, where [directory] is the extracted directory:

cd [directory]
Run the following command to begin the installation:

sh ./install.sh

The installation begins and Tenable Security Center stops.
After the installation finishes, Tenable Security Center automatically restarts. You may be logged out of the Tenable Security Center pod after you apply the patch.