CVE-2025-71311 fs/ntfs3: Initialize new folios before use

What is CVE-2025-71311?

CVE-2025-71311 is a high-severity vulnerability in Linux kernel, published on 27 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-908

Which versions are affected by CVE-2025-71311?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-71311?

Apply the vendor's patch.

Is CVE-2025-71311 being exploited?

There is no known exploitation of CVE-2025-71311 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2025-71311, DEBIAN-CVE-2025-71311, GHSA-55mq-jw86-3h27, UBUNTU-CVE-2025-71311.