Heap buffer overflow

CVE-2026-90133

Summary

A CWE-122: Heap buffer overflow in the Linux kernel's NTFS filesystem driver can corrupt kernel memory. It occurs because ntfs_ir_to_ib() copies NTFS index entries into a fixed-size buffer without confirming they fit.

Impact

An attacker able to supply a crafted NTFS filesystem image can cause a heap out-of-bounds write after the image is processed by the Linux kernel. Successful exploitation could corrupt kernel memory, potentially causing a system crash or enabling arbitrary code execution in kernel context.

Issue Date

September 17, 2026

Affects

This issue affects the Linux kernel 7.1

CVE Name

CVE-2026-90133

CVSS Details

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS Score

7.8

Solution

Update to Linux kernel 7.2.6

Mitigations

Acknowledgements

Alexandro Calo' at Nozomi Networks

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