What’s Vulnerable › Vulnerabilities

CVE-2023-53732: fs/ntfs3: Fix NULL dereference in ni_write_inode

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-22 · updated 2026-10-28

Description

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix NULL dereference in ni_write_inode Syzbot reports a NULL dereference in ni_write_inode. When creating a new inode, if allocation fails in mi_init function (called in mi_format_new function), mi->mrec is set to NULL. In the error path of this inode creation, mi->mrec is later dereferenced in ni_write_inode. Add a NULL check to prevent NULL dereference.

Affected products

• Linux kernel: 5.15 — fixed in 6.4

How to fix

Upgrade to a fixed version: Linux kernel 6.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/8dae4f6341e335a09575be60b4fdf697c732a470
• https://git.kernel.org/stable/c/b1135fbaf8ebef93df326761ac70ebcc3c2e3d63
• https://git.kernel.org/stable/c/b3152afc0eb864f7c6ecad134a15b577ef7aec77
• https://git.kernel.org/stable/c/d4b74482529516477cf7b12502538e51827c699f

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