---
title: "CVE-2026-90118: Linux Kernel - Out-of-Bounds Write"
description: "Linux kernel contains an off-by-one page overflow in ntfs_decompress() caused by improper boundary check, letting attackers trigger out-of-bounds writes when reading corrupted compressed $DATA attributes, exploit requires crafted corrupted NTFS data."
url: https://panop.io/threat-heartbeat/CVE-2026-90118/
---

# CVE-2026-90118 Linux Kernel - Out-of-Bounds Write

Linux kernel contains an off-by-one page overflow in ntfs\_decompress() caused by improper boundary check, letting attackers trigger out-of-bounds writes when reading corrupted compressed $DATA attributes, exploit requires crafted corrupted NTFS data.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90118)

## Details

Type

Out-of-Bounds Write

Impact

Denial Of Service, Data Tampering

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\_decompress off-by-one overflow.

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-2026-90118](https://nvd.nist.gov/vuln/detail/CVE-2026-90118)
- [https://git.kernel.org/stable/c/98716c9fce21f6c8a9d71e08cf53e7504fa562f4](https://git.kernel.org/stable/c/98716c9fce21f6c8a9d71e08cf53e7504fa562f4)
- [https://git.kernel.org/stable/c/b42644e425fed4a5cd6c88372655da5c1b52c666](https://git.kernel.org/stable/c/b42644e425fed4a5cd6c88372655da5c1b52c666)

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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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