CVE-2026-68314
net: mctp i3c: clean up notifier and buses if driver register fails
Description
In the Linux kernel, the following vulnerability has been resolved: net: mctp i3c: clean up notifier and buses if driver register fails mctp_i3c_mod_init() registers the I3C bus notifier and then walks the existing buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL) before registering the I3C device driver. If i3c_driver_register() fails, the function returns the error directly, leaving the notifier registered and every mctp_i3c_bus object created for the existing buses allocated. The notifier is left pointing into the module that failed to load and the bus list is leaked. Mirror the module exit path on this failure: unregister the notifier and tear down the buses that were added before returning the error. This issue was identified during our ongoing static-analysis research while reviewing kernel code.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the kernel patch for net: mctp i3c.
- Unregister the I3C bus notifier.
- Tear down added mctp_i3c_bus objects.
- Ensure proper error handling for driver registration.
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-2026-68314.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68314 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-2026-68314
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-2026-68314 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68314 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 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '49d15cfab247c0f60ce1800bdcd66850beea7b3a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a8bd8c109da5a87f0c5db0c23cf550d039fde77c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a40e83a34eaa2be64372286040696f04eabcd09f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '03d1057305ef17ac3f5936ac1580bc9a1a826e14', 'versionType': 'git'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.7', 'versionType': 'semver'}, {'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': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '49d15cfab247c0f60ce1800bdcd66850beea7b3a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a8bd8c109da5a87f0c5db0c23cf550d039fde77c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a40e83a34eaa2be64372286040696f04eabcd09f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '03d1057305ef17ac3f5936ac1580bc9a1a826e14', 'versionType': 'git'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.7', 'versionType': 'semver'}, {'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': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 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 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 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': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '49d15cfab247c0f60ce1800bdcd66850beea7b3a', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a8bd8c109da5a87f0c5db0c23cf550d039fde77c', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': 'a40e83a34eaa2be64372286040696f04eabcd09f', 'versionType': 'git'}, {'status': 'affected', 'version': 'c8755b29b58ec65be17bcb8c40763d2dcb1f1db5', 'lessThan': '03d1057305ef17ac3f5936ac1580bc9a1a826e14', 'versionType': 'git'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.7'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.7', 'versionType': 'semver'}, {'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': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/mctp/mctp-i3c.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net: mctp i3c: clean up notifier and buses if driver register fails mctp_i3c_mod_init() registers the I3C bus notifier and then walks the existing buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL) before registering the I3C device driver. If i3c_driver_register() fails, the function returns the error directly, leaving the notifier registered and every mctp_i3c_bus object created for the existing buses allocated. The notifier is left pointing into the module that failed to load and the bus list is leaked. Mirror the module exit path on this failure: unregister the notifier and tear down the buses that were added before returning the error. This issue was identified during our ongoing static-analysis research while reviewing kernel code. Added Reference https://git.kernel.org/stable/c/03d1057305ef17ac3f5936ac1580bc9a1a826e14 Added Reference https://git.kernel.org/stable/c/49d15cfab247c0f60ce1800bdcd66850beea7b3a Added Reference https://git.kernel.org/stable/c/a40e83a34eaa2be64372286040696f04eabcd09f Added Reference https://git.kernel.org/stable/c/a8bd8c109da5a87f0c5db0c23cf550d039fde77c