Memory Management Code Vulnerability in Linux Kernel by Linux Foundation
CVE-2026-23225

Currently unrated

Key Information:

Vendor: Linux
Status: Linux
Vendor: CVE Published:; 18 February 2026

What is CVE-2026-23225?

A vulnerability exists in the Linux kernel related to improper assumptions about CPU ownership in memory management. The issue arises during context switching from per-CPU mode to per-task mode, where an out-of-bounds access could occur due to the state of the CID not being correctly validated. Specifically, if a process exits while the TRANSIT bit is set, a function inadvertently attempts to clear an excessively large bit number, leading to potential instability or exploitation. It is crucial that validations are implemented to ensure the CID is indeed CPU owned before any modifications are made to prevent such vulnerabilities.

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