---
title: "CVE-2026-89481: Linux Kernel nvme-tcp - Information Disclosure"
description: "Linux kernel nvme-tcp contains an information disclosure vulnerability caused by improper direction check in nvme_tcp_handle_r2t for read commands, letting malicious controllers read host memory, exploit requires malicious controller sending crafted R2T packets."
url: https://panop.io/threat-heartbeat/CVE-2026-89481/
---

# CVE-2026-89481 Linux Kernel nvme-tcp - Information Disclosure

Linux kernel nvme-tcp contains an information disclosure vulnerability caused by improper direction check in nvme\_tcp\_handle\_r2t for read commands, letting malicious controllers read host memory, exploit requires malicious controller sending crafted R2T packets.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.41% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89481)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version with the nvme-tcp 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-2026-89481](https://nvd.nist.gov/vuln/detail/CVE-2026-89481)
- [https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5](https://git.kernel.org/stable/c/3a0b05145053a5fad1a2ddb4e4d87b07385e63e5)
- [https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c](https://git.kernel.org/stable/c/3b3d27670c0c890ba7cf1bc3614cab61bde6d25c)
- [https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8](https://git.kernel.org/stable/c/6efbc52237facda35d2d874fe1765bb4839275d8)
- [https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403](https://git.kernel.org/stable/c/a4c3c7310156493797c920b10d8648c07aa05403)
- [https://git.kernel.org/stable/c/49a4dcf57608ebf6432dbcb203ed25e7ed581445](https://git.kernel.org/stable/c/49a4dcf57608ebf6432dbcb203ed25e7ed581445)
- [https://git.kernel.org/stable/c/bc4013c7cce58d46f792c8c87bc8c8318a70190e](https://git.kernel.org/stable/c/bc4013c7cce58d46f792c8c87bc8c8318a70190e)

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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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