Signal Handling Flaw in Linux Kernel Impacting ARM64 Architecture
CVE-2026-23107

Currently unrated

Key Information:

Vendor: Linux
Status: Linux
Vendor: CVE Published:; 4 February 2026

What is CVE-2026-23107?

A vulnerability in the Linux kernel affects ARM64 architecture by mishandling the restoration of signal contexts for ZA. When a task is restored under conditions where its SVE state has not been properly allocated, this can lead to a scenario where the kernel attempts to access a NULL pointer, causing a crash. The flaw arises from the failure to allocate the necessary SVE state before setting the TIF_SME flag, leading to potential system instability during signal handling processes. The issue must be addressed to prevent invalid task states and ensure robust system performance.

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