Linux Kernel Vulnerability in HugeTLB Shared Page Table Management
CVE-2026-23100

Currently unrated

Key Information:

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

What is CVE-2026-23100?

A vulnerability has been identified in the Linux kernel related to the management of HugeTLB shared page tables. The issue arises from the hugetlb_pmd_shared() function, which fails to correctly detect shared tables, leading to potential mismanagement of memory references. This oversight can result in performance regressions during operations that involve multiple page counts. The recent patch addresses this by implementing a proper shared counting mechanism, ensuring that shared PMD tables are detected accurately, thereby mitigating the risk of accounting errors and optimizing memory operations.

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