Memory Access Flaw in Linux Kernel x86 Platform by Vendor

CVE-2026-64235

What is CVE-2026-64235?

A memory access vulnerability in the Linux kernel affects x86 platforms, particularly with the CONFIG_CALL_DEPTH_TRACKING enabled. When a dynamic ftrace trampoline is registered, it can lead to a page fault, causing a kernel panic and ultimately crashing the system. This occurs due to incorrect %rip-relative addressing, which fails to retrieve the per-cpu call depth value correctly. Fixing this requires adjustments to ensure the trampoline functions reliably without causing instability in the kernel.

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