---
title: "CVE-2026-89779: Linux Kernel - Information Disclosure"
description: "Linux kernel fs/ntfs3 contains an information disclosure vulnerability caused by improper validation of ef->size in extended attribute records, letting local attackers leak heap memory via crafted NTFS images, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-89779/
---

# CVE-2026-89779 Linux Kernel - Information Disclosure

Linux kernel fs/ntfs3 contains an information disclosure vulnerability caused by improper validation of ef->size in extended attribute records, letting local attackers leak heap memory via crafted NTFS images, exploit requires local access.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.70% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89779)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for fs/ntfs3 extended attribute validation.

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-2026-89779](https://nvd.nist.gov/vuln/detail/CVE-2026-89779)
- [https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146](https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146)
- [https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9](https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9)
- [https://git.kernel.org/stable/c/077df8464cf24f8ffc82fb6efec2ae600686e699](https://git.kernel.org/stable/c/077df8464cf24f8ffc82fb6efec2ae600686e699)
- [https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc](https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc)
- [https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44](https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44)
- [https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818](https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818)
- [https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c](https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c)

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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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