Linux Kernel: Critical KVM and Scheduler Fixes
Linus Torvalds merged critical fixes for KVM virtualization bugs including a 16-year-old shadow paging vulnerability, scheduler crashes, and memory allocation issues. The updates address stability problems across x86 virtualization, task scheduling, and architecture-specific boot failures.
Duration: PT2M20S
Episode overview
This episode is a short developer briefing from Linux Kernel.
It explains recent repository work in plain language.
- Show: Linux Kernel
- Published: 2026-05-03T00:00:00Z
- Audio duration: PT2M20S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, this is your Linux Kernel briefing for May 3rd, 2026.
Today's activity centers on critical stability fixes with eleven commits addressing serious kernel vulnerabilities and regressions.
The most significant update comes from Paolo Bonzini's KVM fixes, merged by Linus Torvalds. This includes a fix for a shadow paging use-after-free vulnerability that's existed for sixteen years, dating back to KVM's original implementation. The bug could cause memory corruption when guest page tables change between…
Scheduler fixes from Ingo Molnar tackle several critical issues in the fair scheduler. Most notably, a fix prevents NULL pointer dereference crashes in the EEVDF scheduler when forked entities aren't properly initialized. The updates also resolve negative lag calculations and delayed dequeue handling that could…
Memory management received attention with Vlastimil Babka's slab fixes addressing CONFIG_SMP=n configurations. The changes ensure proper protection for memory allocations in NMI contexts on single-processor systems, preventing potential corruption in interrupt handlers.
Architecture-specific fixes include a boot regression repair for SuperH systems. The ZERO_PAGE…