Critical Linux Server Vulnerability CVE-2026-23210 The recent discovery of CVE-2026-23210 highlights a critical vulnerability in the Linux kernel. This flaw involves a NULL pointer dereference during the Virtual Switch Instance (VSI) rebuild process, which can severely impact server security. Understanding this vulnerability is crucial for system administrators and hosting providers to protect their Linux servers […]

Understanding the Recent Linux Kernel Vulnerability The Linux kernel has been relatively stable, but recent vulnerabilities remind us that server security remains paramount. One such vulnerability recently emerged regarding the Kernel-based Virtual Machine (KVM). Understanding these vulnerabilities is crucial for system administrators, hosting providers, and web server operators. Summary of the Incident The issue at […]

Critical Linux Server Vulnerability CVE-2026-23210 The recent discovery of CVE-2026-23210 highlights a critical vulnerability in the Linux kernel. This flaw involves a NULL pointer dereference during the Virtual Switch Instance (VSI) rebuild process, which can severely impact server security. Understanding this vulnerability is crucial for system administrators and hosting providers to protect their Linux servers […]

Understanding the Recent Linux Kernel Vulnerability The Linux kernel has been relatively stable, but recent vulnerabilities remind us that server security remains paramount. One such vulnerability recently emerged regarding the Kernel-based Virtual Machine (KVM). Understanding these vulnerabilities is crucial for system administrators, hosting providers, and web server operators. Summary of the Incident The issue at […]

Here, at BitNinja we always keep a close look on the defended incidents in order to discover attack trends and new attack types. Currently, BitNinja protects over 5000 servers worldwide and we are effectively defending more than 50 millions incidents every week. Undoubtedly, we still see many “oldtimer” attack types between these incidents such as […]

Where are our tech ninjas? The first quarter of 2019 was quite stirring. We have also published several articles about our work. So, let’s start just by thinking about these developments: FTP CAPTCHA New SenseLog rules Newly discovered file uploader botnet Patched Drupal vulnerability Defense Robot Anti-Phishing Also, what happened in Q2? Malware Scanner Slack […]

There is a huge demand for buying botnets on the Dark Web, so it’s not a surprise that new kinds of botnets appear from time to time in order to meet the needs of the cybergangs. Of course, there are some old but constantly attacking botnets, like the most popular Mirai botnet or the Hello […]

I was about to outline the most important conclusions - in terms of results and values that we can give, after ending the 100th user interview this month at BitNinja. Although many of our partners have been happy to see how BitNinja transformed their server security, yet they are still surprised when they experience the […]

Back in October, we collected your feedback about our upcoming chat integration. As 59% of you asked for notification options for Slack to ease your daily job, we started working on that soon and here we come with the result. We're happy to announce BitNinja's Slack integration! We know every team works with a handful […]

WordPress is by far the most popular CMS today. However, this popularity has an unfortunate side effect of also making WordPress sites extremely exposed to potential attacks. It means quite a huge challenge to web hosting providers to keep the hackers out of their business. Fortunately, this task is not impossible. https://kinsta.com Our great partner, Mijn […]

100% server uptime... Every hosting company is dreaming about it as nowadays when there are countless service providers, customers will choose the one which grants reliability. What happens when a website is inaccessible? It’s always painful for the website owner, the visitors and for the hosting company. There could be many reasons behind it, but […]

Time is a limited resource for all IT teams. They must be quick, effective and focused on the right goals. However, when the house is burning - let’s say hackers infected your servers, often you have to throw your projects away and start fire fighting to prevent further damage. But are you? Shouldn’t a server […]

It’s been a while since I wrote the previous episode of my blog series. If you are interested in Remote Code Execution, then I definitely recommend reading the previous part. So, here we are again, the moment has come for my final article about cross-site scripting (XSS). What is Cross-Site Scripting (XSS)? Usually, XSS vulnerability […]

Introduction Server security is critical for hosting providers and web server operators. Recently, a vulnerability identified as CVE-2026-23199 has emerged in the Linux kernel regarding the procfs file system. This issue poses potential risks that server administrators must understand and mitigate effectively. Summary of the Vulnerability The Linux kernel vulnerability CVE-2026-23199 involves the procfs file […]

Understanding CVE-2026-23201: A Critical Linux Kernel Vulnerability The Linux kernel recently faced a vulnerability labeled CVE-2026-23201. This vulnerability affects the ceph module, leading to potential server crashes when reading ceph snapshot directories. This incident raises significant concerns for system administrators and hosting providers, especially those operating Linux servers. What is CVE-2026-23201? CVE-2026-23201 addresses a kernel […]

Understanding CVE-2026-23187 and Its Implications for Server Security The recent disclosure of CVE-2026-23187 highlights a critical vulnerability in the Linux kernel affecting server security. This flaw could allow unauthorized access and potential exploitation if left unaddressed. Overview of CVE-2026-23187 This vulnerability pertains to an out-of-range access issue in the imx8m_blk_ctrl_remove() function. It is crucial for […]