procfs networking

About this tag
The procfs networking tag covers discussions about the /proc filesystem's network-related interfaces in Linux, with a focus on kernel-level issues. A recent thread highlights CVE-2026-23255, a security vulnerability in /proc/net/ptype caused by a race condition in RCU protection. The fix adds proper read-side synchronization to prevent concurrent list updates from corrupting the procfs dump path. This tag is relevant for developers and system administrators interested in kernel networking, memory safety, and observability. Topics include RCU semantics, packet type handlers, and the ongoing effort to harden procfs against concurrency bugs.

  1. CVE-2026-23255 Fixes RCU Race in Linux /proc/net/ptype

    The Linux kernel’s /proc/net/ptype path is getting a security-focused fix that looks small on the surface but matters because it closes a classic concurrency hole: iterating packet type handlers without enough read-side protection. The issue is tracked as CVE-2026-23255, and the upstream change...
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    • cve-2026-23255 linux kernel security procfs networking rcu protection
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    • Forum: Security Alerts