CVE-2026-89782 Linux kernel fs/ntfs3 - Use After Free

Linux kernel fs/ntfs3 contains a use-after-free vulnerability caused by improper handling of restart table growth beyond U16_MAX entries during $LogFile replay, letting attackers cause out-of-bounds memory access, exploit requires mounting a crafted NTFS image.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for restart table growth validation in fs/ntfs3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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