Thursday, May 28, 2026

Security Onion 3.1.0 Hotfix 20260528 Now Available!

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Last week, we released Security Onion 3.1.0: https://blog.securityonion.net/2026/05/security-onion-310-now-available-with.html Today we are ...
Wednesday, May 27, 2026

Security Onion Documentation Printed Book Now Updated for Security Onion 3.1!

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We've been offering our Security Onion documentation in book form on Amazon for a few years and it's now been updated for the recent...
Thursday, May 21, 2026

Security Onion 3.1.0 Now Available with Elastic 9.3.3, Suricata 8.0.5, Zeek 8.0.8, and much more!

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Security Onion 3.1.0 is now available and includes new features, updated components, and many quality of life improvements! For a full scree...
Monday, May 18, 2026

Security Onion Conference 2026 Save the Date and CFP

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This year's Security Onion Conference is currently scheduled to be held in person in Augusta, GA on Friday, October 23, 2026. Registrati...
Friday, May 8, 2026

Security Onion and Linux Kernel Dirty Frag Vulnerability CVE-2026-43284

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There is a new local privilege escalation called Dirty Frag (CVE-2026-43284): https://access.redhat.com/security/cve/cve-2026-43284 Updated ...
Friday, May 1, 2026

Security Onion and Linux Kernel Copy Fail Vulnerability CVE-2026-31431

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A flaw was found in the Linux kernel that allows for local privilege escalation: https://access.redhat.com/security/cve/cve-2026-31431 Updat...
Wednesday, April 22, 2026

Security Onion Documentation Printed Book Now Updated for Security Onion 3.0!

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We've been offering our Security Onion documentation in book form on Amazon for a few years and it's now been updated for the recent...
Tuesday, April 21, 2026

Early Bird Discount for "Security Onion for Analysts and Threat Hunters" Class Running Virtually in August 2026!

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Our "Security Onion for Analysts and Threat Hunters" class will be running virtually August 25, 2026 through August 28, 2026. Use ...
Tuesday, April 7, 2026

Security Onion 2.4.211 Hotfix 20260407 Now Available!

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Last month, we released version 2.4.211: https://blog.securityonion.net/2026/03/security-onion-24211-is-now-available.html Today we are rele...
Wednesday, April 1, 2026

6 month EOL notice for Security Onion 2.4

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Yesterday, we released Security Onion 3: https://blog.securityonion.net/2026/03/security-onion-300-now-available-with.html Today, we are ann...
Tuesday, March 31, 2026

Security Onion 3.0.0 Now Available with New and Improved Interface and Much More!

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Security Onion 3.0.0 is now available and includes a new and improved interface, updated components, and many quality of life improvements! ...
Thursday, March 12, 2026

Security Onion 2.4.211 Is Now Available and Resolves Several Issues!

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Last week, we released Security Onion 2.4.210: https://blog.securityonion.net/2026/03/security-onion-24210-now-available-with.html We found ...
Monday, March 9, 2026

Security Onion 3.0 Coming Soon!

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Last week, we released Security Onion 2.4.210: https://blog.securityonion.net/2026/03/security-onion-24210-now-available-with.html This is o...

Security Onion Documentation printed book now updated for Security Onion 2.4.210!

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We've been offering our Security Onion documentation in book form on Amazon for a few years and it's now been updated for the recent...
Monday, March 2, 2026

Security Onion 2.4.210 Now Available with Updated Components and New Features including Local Model Support for Onion AI!

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For Security Onion Pro customers, we've made major improvements for our popular new Onion AI Assistant. Many folks have been asking for ...
Tuesday, January 27, 2026

Security Onion Essentials 2026

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We've updated our popular Security Onion Essentials video series!
Thursday, January 15, 2026

Security Onion 2.4.201 now available with Suricata and Zeek Updates!

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Last month, we released Security Onion 2.4.200: https://blog.securityonion.net/2025/12/security-onion-24200-now-available-with.html This wee...
Tuesday, January 6, 2026

New Video: Introduction to Security Onion 2.4

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Check out the latest version of one of our most popular videos: Introduction to Security Onion 2.4
Wednesday, December 31, 2025

Security Onion 2025 Year in Review

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2025 has been our best year ever! Let's take a look at how Security Onion has improved this year. Security Onion 2.4.120 https://blog.se...

Early Bird Discount for upcoming Security Onion Fundamentals for Analysts and Threat Hunters Class in Colorado

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Our "Security Onion Fundamentals for Analysts and Threat Hunters" class will be running Tuesday April 21, 2026 through Friday Apri...