Friday, September 11, 2026

Security Onion 3.3.0 Hotfix 20260911 Now Available!

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Earlier this week, we released Security Onion 3.3.0: https://blog.securityonion.net/2026/09/security-onion-330-now-available.html Today we a...
Tuesday, September 8, 2026

Security Onion 3.3.0 Now Available including Agentic AI Improvements!

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Security Onion 3.3.0 is now available and includes new features, updated components, and many quality of life improvements! For a full scree...
Thursday, August 6, 2026

Registration Now Open for Augusta Cyber Week 2026!

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Registration is now open for Augusta Cyber Week in beautiful Augusta GA from October 19, 2026 through October 24, 2026! This includes: 4-day...

Security Onion Documentation Printed Book Now Updated for Security Onion 3.2!

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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...
Wednesday, July 29, 2026

Security Onion 3.2.0 Now Available with Agentic AI and Much More!

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Security Onion 3.2.0 is now available and includes new features, updated components, and many quality of life improvements! For a full scree...
Monday, July 6, 2026

Possible Software RAID Issue With Recent mdadm Package

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We identified an issue with mdadm version "mdadm - v4.4 - 2024-11-07 - 4" that can cause software RAID issues after a reboot. We h...
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 ...