CVE-2025-71311
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Uninitialized Memory Exposure in Linux Kernel NTFS3

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Initialize new folios before use KMSAN reports an uninitialized value in longest_match_std(), invoked from ntfs_compress_write(). When new folios are allocated without being marked uptodate and ni_read_frame() is skipped because the caller expects the frame to be completely overwritten, some reserved folios may remain only partially filled, leaving the rest memory uninitialized.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2025-71311
EUVD
EUVD-2025-209965
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's NTFS3 filesystem driver. It occurs because new folios (memory pages) are allocated without being properly initialized or marked as up-to-date before use. Specifically, when the function ntfs_compress_write() calls longest_match_std(), some folios may remain only partially filled, leaving parts of the memory uninitialized. This can lead to the use of uninitialized memory values.

Impact Analysis

The impact of this vulnerability is related to the use of uninitialized memory in the Linux kernel's NTFS3 driver. Using uninitialized memory can lead to unpredictable behavior, including potential information leaks or system instability. However, the exact impact depends on how the uninitialized memory is accessed or exploited.

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