CVE-2026-89611 Linux Kernel ntfs - Memory Corruption

Linux kernel ntfs subsystem contains a buffer overflow vulnerability caused by improper validation of non-resident attribute name offsets during conversion between non-sparse and sparse attributes, letting attackers cause memory corruption, exploit requires crafted malicious MFT record.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.55% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Memory Corruption
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ntfs attribute offset validation.

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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