---
title: "CVE-2026-89610: Linux Kernel - Privilege Escalation"
description: "Linux kernel contains a privilege escalation caused by improper validation of NTFS mapping pairs run length exceeding volume boundary, letting attackers cause memory corruption and escalate privileges, exploit requires crafted NTFS image."
url: https://panop.io/threat-heartbeat/CVE-2026-89610/
---

# CVE-2026-89610 Linux Kernel - Privilege Escalation

Linux kernel contains a privilege escalation caused by improper validation of NTFS mapping pairs run length exceeding volume boundary, letting attackers cause memory corruption and escalate privileges, exploit requires crafted NTFS image.

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-2026-89610)

## Details

Type

Privilege Escalation

Impact

Privilege Escalation, Denial Of Service

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 with the NTFS run length validation fix.

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-2026-89610](https://nvd.nist.gov/vuln/detail/CVE-2026-89610)
- [https://git.kernel.org/stable/c/6e844d4b82434a781b80d02145fd1b17cf90e3c3](https://git.kernel.org/stable/c/6e844d4b82434a781b80d02145fd1b17cf90e3c3)
- [https://git.kernel.org/stable/c/fea9e4488f384c0ef1c0e3d96b565127c1b98447](https://git.kernel.org/stable/c/fea9e4488f384c0ef1c0e3d96b565127c1b98447)

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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

Panop answers these inside your environment, for this CVE and every other finding.

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