---
title: "CVE-2026-89781: Linux Kernel - Out-of-Bounds Read"
description: "Linux kernel contains an out-of-bounds read vulnerability in fs/ntfs3 read_log_rec_buf() caused by unchecked offset from on-disk restart area, letting attackers with crafted NTFS images cause memory corruption during log replay, exploit requires mounting a crafted NTFS image."
url: https://panop.io/threat-heartbeat/CVE-2026-89781/
---

# CVE-2026-89781 Linux Kernel - Out-of-Bounds Read

Linux kernel contains an out-of-bounds read vulnerability in fs/ntfs3 read\_log\_rec\_buf() caused by unchecked offset from on-disk restart area, letting attackers with crafted NTFS images cause memory corruption during log replay, exploit requires mounting a crafted NTFS image.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.20% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89781)

## Details

Type

Out-of-Bounds Read

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/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-2026-89781](https://nvd.nist.gov/vuln/detail/CVE-2026-89781)
- [https://git.kernel.org/stable/c/53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531](https://git.kernel.org/stable/c/53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531)
- [https://git.kernel.org/stable/c/700973cc65db405bde0368ccf88699390150943e](https://git.kernel.org/stable/c/700973cc65db405bde0368ccf88699390150943e)
- [https://git.kernel.org/stable/c/74a83aa05f73033af719771ab1f0c269928b4865](https://git.kernel.org/stable/c/74a83aa05f73033af719771ab1f0c269928b4865)
- [https://git.kernel.org/stable/c/de603b9d377fab57a5e6432fa84a9f36b32c1636](https://git.kernel.org/stable/c/de603b9d377fab57a5e6432fa84a9f36b32c1636)
- [https://git.kernel.org/stable/c/df099bfdb57773ba7f40f8a9dcc82e75af277922](https://git.kernel.org/stable/c/df099bfdb57773ba7f40f8a9dcc82e75af277922)
- [https://git.kernel.org/stable/c/1b2d31f1083beb80c55d1152249f652c1445a559](https://git.kernel.org/stable/c/1b2d31f1083beb80c55d1152249f652c1445a559)
- [https://git.kernel.org/stable/c/49f7cbc902b08b56eb7d2633163ecc57a0e7145a](https://git.kernel.org/stable/c/49f7cbc902b08b56eb7d2633163ecc57a0e7145a)

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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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