---
title: "CVE-2026-90048: Linux Kernel - Out of Bounds Read/Write"
description: "Linux kernel contains a slab-out-of-bounds write in ni_create_attr_list() caused by improper buffer sizing when processing NTFS attributes, letting attackers with access to crafted loop-mounted NTFS images cause heap buffer overflow, exploit requires mounting a crafted NTFS image and file attribute modification."
url: https://panop.io/threat-heartbeat/CVE-2026-90048/
---

# CVE-2026-90048 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a slab-out-of-bounds write in ni\_create\_attr\_list() caused by improper buffer sizing when processing NTFS attributes, letting attackers with access to crafted loop-mounted NTFS images cause heap buffer overflow, exploit requires mounting a crafted NTFS image and file attribute modification.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.67% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90048)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/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 for ni\_create\_attr\_list() slab-out-of-bounds write.

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-2026-90048](https://nvd.nist.gov/vuln/detail/CVE-2026-90048)
- [https://git.kernel.org/stable/c/7c4841e2a62794a3bab7c1ff0540580f387e377f](https://git.kernel.org/stable/c/7c4841e2a62794a3bab7c1ff0540580f387e377f)
- [https://git.kernel.org/stable/c/7e9aee7e4d9767cc3e423b3beecb01c7ebb6bbcd](https://git.kernel.org/stable/c/7e9aee7e4d9767cc3e423b3beecb01c7ebb6bbcd)
- [https://git.kernel.org/stable/c/a84f3db72561c4d9281c5ff721ce46b9ffa7f30e](https://git.kernel.org/stable/c/a84f3db72561c4d9281c5ff721ce46b9ffa7f30e)
- [https://git.kernel.org/stable/c/d07e281f2a7710502985d6f80b95ddac8f4e81d5](https://git.kernel.org/stable/c/d07e281f2a7710502985d6f80b95ddac8f4e81d5)
- [https://git.kernel.org/stable/c/fa2215cf451414b0512cd6f7d37a057893811f4d](https://git.kernel.org/stable/c/fa2215cf451414b0512cd6f7d37a057893811f4d)

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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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