Linux Kernel Vulnerability in HugeTLB Page Management - Affects Various Distributions

CVE-2026-80893

What is CVE-2026-80893?

A vulnerability in the Linux kernel relates to the management of HugeTLB pages, specifically during the process of clearing the userfaultfd write-protect (uffd-wp) state at the fork operation. This issue arises when handling migration and hardware poisoned entries, leading to potential data corruption during the forking of processes. The improper handling of swap entries can lead to offsets being incorrectly altered, resulting in latent issues that could affect memory stability and security, especially for applications leveraging large memory pages.

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