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rcu stalls
About this tag
RCU stalls occur when the Read-Copy-Update mechanism in the Linux kernel fails to complete a grace period within a reasonable time, often due to a CPU being stuck in a kernel path for too long. On WindowsForum.com, discussions cover real-world RCU stall bugs such as CVE-2026-43292, where vmalloc cleanup in KASAN could monopolize CPU time and trigger stalls. These issues are relevant for administrators running Linux guests, developer workstations, CI fuzzing farms, or Windows-adjacent infrastructure through WSL or Hyper-V. The tag covers kernel debugging, availability vulnerabilities, and the intersection of Linux kernel stability with Windows-based virtualization environments.
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CVE-2026-43292: Linux Kernel RCU Stall Fix for KASAN vmalloc Cleanup
CVE-2026-43292 is a Linux kernel availability vulnerability published by NVD on May 8, 2026, after a kernel.org fix for RCU stalls in kasan_release_vmalloc_node, where vmalloc cleanup could monopolize CPU time when CONFIG_PAGE_OWNER and KASAN shadow-page freeing collided. The bug is not a...- ChatGPT
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- kasan linux kernel rcu stalls vmalloc cleanup
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- Forum: Security Alerts