---
title: "CVE-2026-89829: Linux Kernel - Data Integrity & Denial of Service"
description: "Linux kernel contains a logic flaw in f2fs_sanity_check_node_footer due to incorrect nid checking caused by not passing folio->index, letting attackers potentially cause data integrity issues, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-89829/
---

# CVE-2026-89829 Linux Kernel - Data Integrity & Denial of Service

Linux kernel contains a logic flaw in f2fs\_sanity\_check\_node\_footer due to incorrect nid checking caused by not passing folio->index, letting attackers potentially cause data integrity issues, exploit requires local access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89829)

## Details

Type

Data Integrity

Impact

Data Tampering, Denial Of Service

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-2026-89829](https://nvd.nist.gov/vuln/detail/CVE-2026-89829)
- [https://git.kernel.org/stable/c/0b196c07407f48a41cd9741cf53e10cb1e23d2e5](https://git.kernel.org/stable/c/0b196c07407f48a41cd9741cf53e10cb1e23d2e5)
- [https://git.kernel.org/stable/c/7e188e9f9437ab47c3237d609f1b26348d6fea1a](https://git.kernel.org/stable/c/7e188e9f9437ab47c3237d609f1b26348d6fea1a)
- [https://git.kernel.org/stable/c/a984446aa9d5b787afa3023fc7b44017b80fe3bc](https://git.kernel.org/stable/c/a984446aa9d5b787afa3023fc7b44017b80fe3bc)

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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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