---
title: "CVE-2026-89832: Linux Kernel - Data Tampering"
description: "Linux kernel contains a data tampering vulnerability in f2fs caused by failure to clear dirty flag on folio in error path, letting attackers persist corrupted node block data, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-89832/
---

# CVE-2026-89832 Linux Kernel - Data Tampering

Linux kernel contains a data tampering vulnerability in f2fs caused by failure to clear dirty flag on folio in error path, letting attackers persist corrupted node block data, exploit requires kernel-level access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89832)

## Details

Type

Data Tampering

Impact

Data Tampering

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the 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-2026-89832](https://nvd.nist.gov/vuln/detail/CVE-2026-89832)
- [https://git.kernel.org/stable/c/5b86eab84ac8e9289b5afc52ef88ab18ba5bacab](https://git.kernel.org/stable/c/5b86eab84ac8e9289b5afc52ef88ab18ba5bacab)
- [https://git.kernel.org/stable/c/ab35ae07f2b5b4e118ea47b88577fc7d0e797b17](https://git.kernel.org/stable/c/ab35ae07f2b5b4e118ea47b88577fc7d0e797b17)
- [https://git.kernel.org/stable/c/34732e3a8713f3b7acd1a0ea37e3a6bee4c78550](https://git.kernel.org/stable/c/34732e3a8713f3b7acd1a0ea37e3a6bee4c78550)
- [https://git.kernel.org/stable/c/3923ec2b98c96dda4a8bfab81d22553dbf0dd6c2](https://git.kernel.org/stable/c/3923ec2b98c96dda4a8bfab81d22553dbf0dd6c2)

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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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