---
id: CVE-2025-68220
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  net: ethernet: ti: netcp: Standardize knav_dma_open_channel to return NULL on
  error


  Make knav_dma_open_channel consistently return NULL on error instead

  of ERR_PTR
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  net: ethernet: ti: netcp: Standardize knav_dma_open_channel to return NULL on
  error


  Make knav_dma_open_channel consistently return NULL on error instead

  of ERR_PTR. Cu…
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68220'
references:
  - url: 'https://git.kernel.org/stable/c/2572c358ee434ce4b994472cceeb4043cbff5bc5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3afeb909c3e2e0eb19b1e20506196e5f2d9c2259'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8427218ecbd7f8559c37972e66cb0fa06e82353b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/90a88306eb874fe4bbdd860e6c9787f5bbc588b5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/952637c5b9be64539cd0e13ef88db71a1df46373'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af6b10a13fc0aee37df4a8292414cc055c263fa3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f9608637ecc165d7d6341df105aee44691461fb9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fbb53727ca789a8d27052aab4b77ca9e2a0fae2b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.0021
epssPercentile: 0.10434
ingestedAt: '2026-10-14T13:30:58.458Z'
---

## Overview

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

net: ethernet: ti: netcp: Standardize knav_dma_open_channel to return NULL on error

Make knav_dma_open_channel consistently return NULL on error instead
of ERR_PTR. Currently the header include/linux/soc/ti/knav_dma.h
returns NULL when the driver is disabled, but the driver
implementation does not even return NULL or ERR_PTR on failure,
causing inconsistency in the users. This results in a crash in
netcp_free_navigator_resources as followed (trimmed):

Unhandled fault: alignment exception (0x221) at 0xfffffff2
[fffffff2] *pgd=80000800207003, *pmd=82ffda003, *pte=00000000
Internal error: : 221 [#1] SMP ARM
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-rc7 #1 NONE
Hardware name: Keystone
PC is at knav_dma_close_channel+0x30/0x19c
LR is at netcp_free_navigator_resources+0x2c/0x28c

[... TRIM...]

Call trace:
 knav_dma_close_channel from netcp_free_navigator_resources+0x2c/0x28c
 netcp_free_navigator_resources from netcp_ndo_open+0x430/0x46c
 netcp_ndo_open from __dev_open+0x114/0x29c
 __dev_open from __dev_change_flags+0x190/0x208
 __dev_change_flags from netif_change_flags+0x1c/0x58
 netif_change_flags from dev_change_flags+0x38/0xa0
 dev_change_flags from ip_auto_config+0x2c4/0x11f0
 ip_auto_config from do_one_initcall+0x58/0x200
 do_one_initcall from kernel_init_freeable+0x1cc/0x238
 kernel_init_freeable from kernel_init+0x1c/0x12c
 kernel_init from ret_from_fork+0x14/0x38
[... TRIM...]

Standardize the error handling by making the function return NULL on
all error conditions. The API is used in just the netcp_core.c so the
impact is limited.

Note, this change, in effect reverts commit 5b6cb43b4d62 ("net:
ethernet: ti: netcp_core: return error while dma channel open issue"),
but provides a less error prone implementation.

## Remediation

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