---
id: CVE-2026-80992
title: 'kernel: net: ravb: avoid dereferencing an invalid PTP clock (CVE-2026-80992)'
summary: >-
  A flaw was found in the `net: ravb` component of the Linux kernel. This
  vulnerability allows for a NULL pointer dereference when the Precision Time
  Protocol (PTP) clock's index is queried before it is properly initialized or
  if its registr…
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-476
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    29ffd972531f8e6e0edf4ea3496190acff9fc9c2
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    bf3308416a2be85dcc9965b614a745b40beeff14
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    fc710f89a644e030a7ca15343176ca862fd61b9d
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    8d4d06d6e2b501cb8e30ed3b1924c470358e8052
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    0aaa53936419cf0c19c670387fc6d431e042a1b6
  - >-
    Linux >= a0d2f20650e81407d8e51ad2cbdc492861c74e9c <
    1f77af0aaf277413ff32f6ff8c2c4282bd64c897
  - Linux 4.2
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T17:36:38+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80992.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80992.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80992'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532047'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80992'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80992'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80992.mbox
  - url: 'https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2'
  - url: 'https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14'
  - url: 'https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d'
  - url: 'https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052'
  - url: 'https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6'
  - url: 'https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00164
epssPercentile: 0.06031
scores:
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.454Z'
---

## Overview

A flaw was found in the `net: ravb` component of the Linux kernel. This vulnerability allows for a NULL pointer dereference when the Precision Time Protocol (PTP) clock's index is queried before it is properly initialized or if its registration fails. This issue could lead to a system crash, resulting in a denial of service.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80992.json)

**kernel: net: ravb: avoid dereferencing an invalid PTP clock** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.

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.