---
title: "CVE-2026-90230: Linux Kernel - Out of Bounds Read"
description: "Linux kernel contains a heap out-of-bounds read in nvmet_auth_negotiate() caused by improper validation of host-supplied transfer length and identifiers, letting malicious hosts cause memory read beyond buffer, exploit requires crafted malicious host input."
url: https://panop.io/threat-heartbeat/CVE-2026-90230/
---

# CVE-2026-90230 Linux Kernel - Out of Bounds Read

Linux kernel contains a heap out-of-bounds read in nvmet\_auth\_negotiate() caused by improper validation of host-supplied transfer length and identifiers, letting malicious hosts cause memory read beyond buffer, exploit requires crafted malicious host input.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.46% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90230)

## Details

Type

Out of Bounds Read

Impact

Information Disclosure, Denial Of Service

CVSS vector

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

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for nvmet\_auth\_negotiate validation.

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-2026-90230](https://nvd.nist.gov/vuln/detail/CVE-2026-90230)
- [https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955](https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955)
- [https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31](https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31)
- [https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209](https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209)
- [https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed](https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed)
- [https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916](https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916)

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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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