Kernel Vulnerability in PowerPC Architecture Affecting Linux Kernel

CVE-2025-38233

What is CVE-2025-38233?

In recent updates to the Linux kernel, a vulnerability has been identified within the PowerPC architecture related to the handling of the r15 register during livepatch sequences. This oversight causes the r15 register to be clobbered without proper restoration, potentially leading to kernel data access failures and subsequent crashes. The error manifests as a critical bug report detailing an inability to handle kernel data access at specific memory addresses, emphasizing the need for immediate remediation through security patches to restore proper r15 handling.

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