---
id: CVE-2026-72120
title: 'can: bcm: add missing rcu list annotations and operations'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  can: bcm: add missing rcu list annotations and operations

  sashiko-bot remarked the missing use of list_add_rcu() in
  bcm_[rx|tx]_setup() to have a proper initialized bc…
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 659701c0b954ccdb4a916a4ad59bbc16e726d42c <
    8357255e56dc1aaa437e3c53ee9385de984e0d57
  - >-
    Linux >= 0622846db728a5332b917c797c733e202c4620ae <
    8e1c7257c81577130f5ce90f69b2a2c3ce63f957
  - >-
    Linux >= 6d7d458c41b98a5c1670cbd36f2923c37de51cf5 <
    eb1c26eab4d1f0b4450439b4b88c3e73faf1da98
  - >-
    Linux >= 1f912f8484e9c4396378c39460bbea0af681f319 <
    f53bdab85e64eb57d6899a30d1307fd5a3639cc7
  - >-
    Linux >= 63567ecd99a24495208dc860d50fb17440043006 <
    4e22e8b505f877573bbdfdbcb680babad9b2f7a1
  - >-
    Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb <
    b06a4a397ac826603f39875cb7c7819a41365196
  - >-
    Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb <
    30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d
  - >-
    Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb <
    7b2c3eabc4dafc062a25e10711154f2107526a78
  - Linux 19f553a1ddf260da6570ed8f8d91a8c87f49b63a
  - Linux 7c9db92d5f0eadca30884af75c53d601edc512ee
  - Linux >= 5.10.238 < 5.10.261
  - Linux >= 5.15.185 < 5.15.212
  - Linux >= 6.1.141 < 6.1.178
  - Linux >= 6.6.93 < 6.6.145
  - Linux >= 6.12.31 < 6.12.97
  - Linux >= 5.4.294 < 5.5
  - Linux >= 6.14.9 < 6.15
  - Linux 6.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:41:58.342764Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:44:57.136Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72120'
references:
  - url: 'https://git.kernel.org/stable/c/8357255e56dc1aaa437e3c53ee9385de984e0d57'
  - url: 'https://git.kernel.org/stable/c/8e1c7257c81577130f5ce90f69b2a2c3ce63f957'
  - url: 'https://git.kernel.org/stable/c/eb1c26eab4d1f0b4450439b4b88c3e73faf1da98'
  - url: 'https://git.kernel.org/stable/c/f53bdab85e64eb57d6899a30d1307fd5a3639cc7'
  - url: 'https://git.kernel.org/stable/c/4e22e8b505f877573bbdfdbcb680babad9b2f7a1'
  - url: 'https://git.kernel.org/stable/c/b06a4a397ac826603f39875cb7c7819a41365196'
  - url: 'https://git.kernel.org/stable/c/30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d'
  - url: 'https://git.kernel.org/stable/c/7b2c3eabc4dafc062a25e10711154f2107526a78'
tags:
  - cve.org
epss: 0.00169
epssPercentile: 0.05785
ingestedAt: '2026-10-16T19:46:24.430Z'
---

## Overview

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

can: bcm: add missing rcu list annotations and operations

sashiko-bot remarked the missing use of list_add_rcu() in
bcm_[rx|tx]_setup() to have a proper initialized bcm_op structure
when bcm_proc_show() traverses the bcm_op's under rcu_read_lock().

To cover all initial settings of the bcm_op's the list_add_rcu() calls
are moved to the end of the setup code.

While at it, also fix the mirroring removal side: bcm_release() called
bcm_remove_op() - which frees the op via call_rcu() - on ops that were
still linked in bo->tx_ops/bo->rx_ops, without list_del_rcu() first.
Unlink each op with list_del_rcu() before handing it to bcm_remove_op(),
matching the existing pattern in bcm_delete_tx_op()/bcm_delete_rx_op().

## Affected

- `Linux >= 659701c0b954ccdb4a916a4ad59bbc16e726d42c < 8357255e56dc1aaa437e3c53ee9385de984e0d57`
- `Linux >= 0622846db728a5332b917c797c733e202c4620ae < 8e1c7257c81577130f5ce90f69b2a2c3ce63f957`
- `Linux >= 6d7d458c41b98a5c1670cbd36f2923c37de51cf5 < eb1c26eab4d1f0b4450439b4b88c3e73faf1da98`
- `Linux >= 1f912f8484e9c4396378c39460bbea0af681f319 < f53bdab85e64eb57d6899a30d1307fd5a3639cc7`
- `Linux >= 63567ecd99a24495208dc860d50fb17440043006 < 4e22e8b505f877573bbdfdbcb680babad9b2f7a1`
- `Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb < b06a4a397ac826603f39875cb7c7819a41365196`
- `Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb < 30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d`
- `Linux >= dac5e6249159ac255dad9781793dbe5908ac9ddb < 7b2c3eabc4dafc062a25e10711154f2107526a78`
- `Linux 19f553a1ddf260da6570ed8f8d91a8c87f49b63a`
- `Linux 7c9db92d5f0eadca30884af75c53d601edc512ee`
- `Linux >= 5.10.238 < 5.10.261`
- `Linux >= 5.15.185 < 5.15.212`
- `Linux >= 6.1.141 < 6.1.178`
- `Linux >= 6.6.93 < 6.6.145`
- `Linux >= 6.12.31 < 6.12.97`
- `Linux >= 5.4.294 < 5.5`
- `Linux >= 6.14.9 < 6.15`
- `Linux 6.15`

## Remediation

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