---
id: CVE-2026-74707
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  xsk: validate metadata when processing requests

  The zero-copy path validates TX metadata while obtaining the descriptor
  context, then reads it again later when prepari…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  xsk: validate metadata when processing requests

  The zero-copy path validates TX metadata while obtaining the descriptor
  context, then reads it again later when prepari…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <
    5fd121971912dee2f5af1efec64462ac722deb17
  - >-
    Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <
    0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba
  - >-
    Linux >= ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 <
    849b1664dbda1cf6c63e0fd4f9dec23782b8c851
  - Linux d9d736c416c9a85f84e15435ba82a177262e745b
  - Linux >= 6.14.2 < 6.15
  - Linux 6.15
published: '2026-08-22'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T20:17:53.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74707'
references:
  - url: 'https://git.kernel.org/stable/c/0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5fd121971912dee2f5af1efec64462ac722deb17'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/849b1664dbda1cf6c63e0fd4f9dec23782b8c851'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74707.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74707'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2521453'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74707'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74707'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-74707'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026082237-CVE-2026-74707-360f@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00184
epssPercentile: 0.07893
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T19:15:08.406835Z'
scores:
  nvd: 7.8
  vendor: 4.7
ingestedAt: '2026-10-14T13:30:58.543Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

xsk: validate metadata when processing requests

The zero-copy path validates TX metadata while obtaining the descriptor
context, then reads it again later when preparing the hardware request.
User space can change the metadata between those operations and bypass the
original validation.

Validate the metadata in xsk_tx_metadata_request() and use the resulting
flags snapshot for every feature check. Read request fields once so all
zero-copy drivers process only values observed after successful
validation.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74707.json)