---
title: "CVE-2026-89838: Linux kernel F2FS - Information Disclosure"
description: "Linux kernel F2FS contains an information disclosure caused by improper handling of non-NUL-terminated recovery filenames in recovery logging, letting attackers read beyond filename buffer, exploit requires local access."
url: https://panop.io/threat-heartbeat/CVE-2026-89838/
---

# CVE-2026-89838 Linux kernel F2FS - Information Disclosure

Linux kernel F2FS contains an information disclosure caused by improper handling of non-NUL-terminated recovery filenames in recovery logging, letting attackers read beyond filename buffer, exploit requires local access.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89838)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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 with the fix for recovery filename logging.

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-2026-89838](https://nvd.nist.gov/vuln/detail/CVE-2026-89838)
- [https://git.kernel.org/stable/c/35c5abccd0924b02ad34126f562d93c8d75b0831](https://git.kernel.org/stable/c/35c5abccd0924b02ad34126f562d93c8d75b0831)
- [https://git.kernel.org/stable/c/7ab1780074943508534343e1e5e5ab0c9ef9dd7b](https://git.kernel.org/stable/c/7ab1780074943508534343e1e5e5ab0c9ef9dd7b)
- [https://git.kernel.org/stable/c/01027b2fcb74dade59fb833b51023f6593b6a9a2](https://git.kernel.org/stable/c/01027b2fcb74dade59fb833b51023f6593b6a9a2)
- [https://git.kernel.org/stable/c/317d32e1a8deaf1c01c388badc667334c39e62ca](https://git.kernel.org/stable/c/317d32e1a8deaf1c01c388badc667334c39e62ca)

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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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