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7.8
HIGH CVSS 3.1
CVE-2026-72113
can: bcm: add missing device refcount for CAN filter removal
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing device refcount for CAN filter removal sashiko-bot remarked a problem with a concurrent device unregistration in isotp.c which also is present in the bcm.c code. A former fix for raw.c commit c275a176e4b6 ("can: raw: add missing refcount for memory leak fix") introduced a netdevice_tracker which solves the issue for bcm.c too. bcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on dev_get_by_index(ifindex) to re-find the device for an rx_op before unregistering its filter. If a concurrent NETDEV_UNREGISTER has already unlisted the device from the ifindex table, that lookup fails and can_rx_unregister() is silently skipped, leaving a stale CAN filter pointing at the soon-to-be-freed bcm_op/socket. Hold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev from the moment the rx filter is registered in bcm_rx_setup() until it is unregistered in bcm_rx_unreg(), and use that reference directly in bcm_release() and bcm_delete_rx_op() instead of re-looking the device up by ifindex.

Details
INFO

Published Date :

Aug. 15, 2026, 6:21 a.m.

Last Modified :

Aug. 17, 2026, 6:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-72113 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Apply a patch to Linux kernel to fix concurrent device unregistration issues.
  • Update the Linux kernel to the latest version.
  • Ensure the patch for bcm.c is applied.
  • Review commit c275a176 for related fixes.
  • Verify netdev_hold and netdev_put are used correctly.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-72113.

URL Resource
https://git.kernel.org/stable/c/04d23061bbf18d5d81022eb21e9d32e99d24468d
https://git.kernel.org/stable/c/633bda66fbf309f5de5e1ad6defe8e6b1d77a20f
https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef
https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041
https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72113 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-72113 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-72113 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-72113 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '84aa4807816e405c1bf87114fc63e06d244281ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '633bda66fbf309f5de5e1ad6defe8e6b1d77a20f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'b024c21c9066f6957b7d4a8f2037e4b000c5e041', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '04d23061bbf18d5d81022eb21e9d32e99d24468d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'd59948293ea34b6337ce2b5febab8510de70048c', 'versionType': 'git'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.25'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.25', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '84aa4807816e405c1bf87114fc63e06d244281ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '633bda66fbf309f5de5e1ad6defe8e6b1d77a20f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'b024c21c9066f6957b7d4a8f2037e4b000c5e041', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '04d23061bbf18d5d81022eb21e9d32e99d24468d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'd59948293ea34b6337ce2b5febab8510de70048c', 'versionType': 'git'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.25'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.25', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '84aa4807816e405c1bf87114fc63e06d244281ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '633bda66fbf309f5de5e1ad6defe8e6b1d77a20f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'b024c21c9066f6957b7d4a8f2037e4b000c5e041', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': '04d23061bbf18d5d81022eb21e9d32e99d24468d', 'versionType': 'git'}, {'status': 'affected', 'version': 'ffd980f976e7fd666c2e61bf8ab35107efd11828', 'lessThan': 'd59948293ea34b6337ce2b5febab8510de70048c', 'versionType': 'git'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.25'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.25', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/can/bcm.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing device refcount for CAN filter removal sashiko-bot remarked a problem with a concurrent device unregistration in isotp.c which also is present in the bcm.c code. A former fix for raw.c commit c275a176e4b6 ("can: raw: add missing refcount for memory leak fix") introduced a netdevice_tracker which solves the issue for bcm.c too. bcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on dev_get_by_index(ifindex) to re-find the device for an rx_op before unregistering its filter. If a concurrent NETDEV_UNREGISTER has already unlisted the device from the ifindex table, that lookup fails and can_rx_unregister() is silently skipped, leaving a stale CAN filter pointing at the soon-to-be-freed bcm_op/socket. Hold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev from the moment the rx filter is registered in bcm_rx_setup() until it is unregistered in bcm_rx_unreg(), and use that reference directly in bcm_release() and bcm_delete_rx_op() instead of re-looking the device up by ifindex.
    Added Reference https://git.kernel.org/stable/c/04d23061bbf18d5d81022eb21e9d32e99d24468d
    Added Reference https://git.kernel.org/stable/c/633bda66fbf309f5de5e1ad6defe8e6b1d77a20f
    Added Reference https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef
    Added Reference https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041
    Added Reference https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
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