---
id: CVE-2026-89480
title: >-
  kernel: nvme-tcp: reject a read that transferred too few bytes
  (CVE-2026-89480)
summary: >-
  A flaw was found in the NVMe-TCP implementation of the Linux kernel. This
  vulnerability occurs when the system completes a data read request even if the
  connected controller transfers fewer bytes than expected. As a result, the
  user applic…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-130
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
  - enterprise_linux_baseos_v_8
  - enterprise_linux_crb_v_8
patched:
  - enterprise_linux_baseos_v_8
  - enterprise_linux_crb_v_8
published: '2026-09-11'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T06:23:30+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89480.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89480.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89480'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532095'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89480'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89480'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89480.mbox
  - url: 'https://access.redhat.com/errata/RHSA-2026:71329'
  - url: 'https://git.kernel.org/stable/c/a5c1bb0fb1bab2f24a081339c145870697f6d220'
  - url: 'https://git.kernel.org/stable/c/aa107e3a68f4af177d60f2d87679e7f67179a36c'
  - url: 'https://git.kernel.org/stable/c/fca3ebb63e5c82561cd9934365dcc0d068008006'
  - url: 'https://git.kernel.org/stable/c/99066cf9bba175f610ceb61a35f6fc9fbc33ff65'
  - url: 'https://git.kernel.org/stable/c/8a02ad98798fd01f51f648c1fdd8f3c9d07195d3'
  - url: 'https://git.kernel.org/stable/c/832a685efeb5d925ee7d30011d2dbe45f81447a3'
  - url: 'https://git.kernel.org/stable/c/7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00415
epssPercentile: 0.35492
scores:
  vendor: 7
  cna: 7.5
ingestedAt: '2026-09-14T15:23:07.453Z'
---

## Overview

A flaw was found in the NVMe-TCP implementation of the Linux kernel. This vulnerability occurs when the system completes a data read request even if the connected controller transfers fewer bytes than expected. As a result, the user application receives a mix of legitimate and stale data, potentially leading to information disclosure or data integrity issues.

## Vendor advisories

- **RHSA-2026:71329** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:71329)
- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89480.json)

**kernel: nvme-tcp: reject a read that transferred too few bytes** — rated Important by Red Hat. Released 2026-09-11, updated 2026-09-24.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Fixed:

- Red Hat Enterprise Linux BaseOS (v. 8)
- Red Hat Enterprise Linux CRB (v. 8)

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7

## Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:71329