---
title: "CVE-2026-90132: Linux Kernel - Broken Access Control"
description: "Linux kernel contains a broken access control vulnerability caused by unprivileged users being able to write to reserved $LX* extended attributes in NTFS, letting attackers modify reserved xattrs, exploit requires CAP_SYS_ADMIN privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-90132/
---

# CVE-2026-90132 Linux Kernel - Broken Access Control

Linux kernel contains a broken access control vulnerability caused by unprivileged users being able to write to reserved $LX\* extended attributes in NTFS, letting attackers modify reserved xattrs, exploit requires CAP\_SYS\_ADMIN privileges.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90132)

## Details

Type

Broken Access Control

Impact

Data Tampering

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fix for reserved $LX\* xattrs write restriction.

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-2026-90132](https://nvd.nist.gov/vuln/detail/CVE-2026-90132)
- [https://git.kernel.org/stable/c/86f46508016bc1f2bffb3a52dc2664f942fb9802](https://git.kernel.org/stable/c/86f46508016bc1f2bffb3a52dc2664f942fb9802)
- [https://git.kernel.org/stable/c/ea6a67ef64451d2da298f15baa35865b4bb6372a](https://git.kernel.org/stable/c/ea6a67ef64451d2da298f15baa35865b4bb6372a)

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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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