Linux kernel
Sources, repositories and tools around the Linux kernel: reading git.kernel.org, tracing commits and mapping kernel fixes to a release.
NewMultipath TCP (MPTCP) on Linux: How It Works, Its History, and How to Check Before Disabling It
Multipath TCP distributes a TCP connection across multiple network paths. Since Go 1.24, many Go services on Linux have been listening via MPTCP without anyone configuring it. With CVE-2026-98432, this has become relevant. This article explains the protocol, its history, and how to check whether you can disable MPTCP.
git.kernel.org explained: site structure and practical use
git.kernel.org is the Git hosting service for Linux kernel development. This overview explains the repository list, path scheme, summary, log, tree, and commit views, URL search parameters, and the short URLs referenced by kernel CVEs.
VMware ESX and Linux Kernel: CISA Reports Attacks on CVE-2026-41709 and Fragnesia
On October 28, 2026, CISA added two vulnerabilities to its KEV catalog: CVE-2026-41709 in VMware ESX (operations without log entries, CVSS 2.7) and CVE-2026-46300 (Fragnesia) in the Linux kernel (privilege escalation, CVSS 7.8). Both have been used in real-world attack chains. Updates have been available for months.
