CVE-2026-90133 Linux Kernel ntfs - Out of Bounds Write

Linux kernel ntfs subsystem contains a heap out-of-bounds write caused by lack of bounds checking in ntfs_ir_to_ib() when copying index_root entries, letting attackers trigger memory corruption via crafted filesystem images, exploit requires crafted filesystem.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Write
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ntfs_ir_to_ib() heap OOB write.

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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