---
id: CVE-2026-89730
title: >-
  kernel: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write
  (CVE-2026-89730)
summary: >-
  A flaw was found in the `altera-cvp` FPGA driver within the Linux kernel. The
  `altera_cvp_send_block()` function can perform an out-of-bounds read when
  processing the trailing bytes of an input buffer. This occurs if the buffer
  ends at a p…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat OpenShift Container Platform 4
affected:
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T08:02:09+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89730'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532368'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89730'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89730'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89730.mbox
  - url: 'https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198'
  - url: 'https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9'
  - url: 'https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb'
  - url: 'https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3'
  - url: 'https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98'
  - url: 'https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717'
  - url: 'https://git.kernel.org/stable/c/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e'
  - url: 'https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.0021
epssPercentile: 0.1157
ingestedAt: '2026-09-14T15:23:07.449Z'
---

## Overview

A flaw was found in the `altera-cvp` FPGA driver within the Linux kernel. The `altera_cvp_send_block()` function can perform an out-of-bounds read when processing the trailing bytes of an input buffer. This occurs if the buffer ends at a page or scatterlist boundary, causing the function to read past valid image data. A local attacker could potentially exploit this to trigger a system fault, leading to a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json)

**kernel: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.