---
id: CVE-2026-64018
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: mana: validate rx_req_idx to prevent out-of-bounds array access

  In mana_hwc_rx_event_handler(), rx_req_idx is derived from
  sge->address in DMA-coherent memory
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: mana: validate rx_req_idx to prevent out-of-bounds array access

  In mana_hwc_rx_event_handler(), rx_req_idx is derived from
  sge->address in DMA-coherent memory. In…
severity: critical
cvss: 9.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-129
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.13, < 5.15.209'
  - 'linux_kernel >= 5.16, < 6.1.175'
  - 'linux_kernel >= 6.2, < 6.6.142'
  - 'linux_kernel >= 6.7, < 6.12.92'
  - 'linux_kernel >= 6.13, < 6.18.34'
  - 'linux_kernel >= 6.19, < 7.0.11'
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.11
published: '2026-07-19'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:50:25.477'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64018'
references:
  - url: 'https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00142
epssPercentile: 0.03058
ingestedAt: '2026-10-13T15:33:40.022Z'
---

## Overview

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

net: mana: validate rx_req_idx to prevent out-of-bounds array access

In mana_hwc_rx_event_handler(), rx_req_idx is derived from
sge->address in DMA-coherent memory. In Confidential VMs
(SEV-SNP/TDX), this memory is shared unencrypted and HW can modify
WQE contents at any time. No bounds check exists on rx_req_idx,
which can lead to an out-of-bounds access into reqs[].

Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before
using it to index the reqs[] array.

## Affected

- `linux_kernel >= 5.13, < 5.15.209`
- `linux_kernel >= 5.16, < 6.1.175`
- `linux_kernel >= 6.2, < 6.6.142`
- `linux_kernel >= 6.7, < 6.12.92`
- `linux_kernel >= 6.13, < 6.18.34`
- `linux_kernel >= 6.19, < 7.0.11`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.11`