---
id: CVE-2026-80779
title: >-
  kernel: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ
  (CVE-2026-80779)
summary: >-
  A flaw was found in the `net/ionic` component of the Linux kernel. This
  out-of-bounds write vulnerability occurs because the dedicated hardware
  timestamp RX queue's index can be used to access memory beyond the bounds of
  the normal transmi…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-787
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-04'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T23:37:01+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80779'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2528560'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80779'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80779'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80779.mbox
  - url: 'https://kernelcve.org/list/?q=CVE-2026-80779'
  - url: 'https://git.kernel.org/stable/c/881a805a8029ba48c0ce81c6674910f8d83f7afb'
  - url: 'https://git.kernel.org/stable/c/39fc615e355b65b8d43be30da57aa95ae6eaf688'
  - url: 'https://git.kernel.org/stable/c/f3868046e8e2e761d4d943a232bd109ff22a7d5b'
  - url: 'https://git.kernel.org/stable/c/ea081b4435515ac7177eb598a3c0678d1b9e7911'
  - url: 'https://git.kernel.org/stable/c/d92255b405fb6f5acca408239ccd742e0a42c9cb'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.06021
ingestedAt: '2026-10-19T10:20:54.955Z'
---

## Overview

A flaw was found in the `net/ionic` component of the Linux kernel. This out-of-bounds write vulnerability occurs because the dedicated hardware timestamp RX queue's index can be used to access memory beyond the bounds of the normal transmit queue array. An attacker could potentially exploit this to cause memory corruption, leading to system instability or other undefined behavior.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json)

**kernel: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-25.

Affected:

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

No fix planned:

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

Not affected:

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

## Remediation

Fix deferred

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.