---
title: "CVE-2026-89614: Linux Kernel - Out of Bounds Read"
description: "Linux kernel ntfs contains an out-of-bounds read caused by improper bounding of the free-cluster bitmap scan in ntfs_cluster_alloc, letting attackers trigger kernel memory corruption, exploit requires crafted NTFS volume with oversized $Bitmap."
url: https://panop.io/threat-heartbeat/CVE-2026-89614/
---

# CVE-2026-89614 Linux Kernel - Out of Bounds Read

Linux kernel ntfs contains an out-of-bounds read caused by improper bounding of the free-cluster bitmap scan in ntfs\_cluster\_alloc, letting attackers trigger kernel memory corruption, exploit requires crafted NTFS volume with oversized $Bitmap.

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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89614)

## Details

Type

Out of Bounds Read

Impact

Denial Of Service, Privilege Escalation

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 that bounds the free-cluster bitmap scan.

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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89614](https://nvd.nist.gov/vuln/detail/CVE-2026-89614)
- [https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d](https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d)
- [https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471](https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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