CVE-2026-68314: net: mctp i3c: clean up notifier and buses if driver register fails
In the Linux kernel, the following vulnerability has been resolved:
net: mctp i3c: clean up notifier and buses if driver register fails
mctpi3cmodinit() registers the I3C bus notifier and then walks the existing buses with i3cforeachbuslocked(mctpi3cbusaddnew, NULL) before registering the I3C device driver. If i3cdriverregister() fails, the function returns the error directly, leaving the notifier registered and every mctpi3cbus 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68314?
CVE-2026-68314 has a risk severity rating of 12.
How do I fix CVE-2026-68314?
To fix CVE-2026-68314, ensure you update your Linux kernel to the version that addresses this vulnerability.
What systems are affected by CVE-2026-68314?
CVE-2026-68314 affects systems running the vulnerable versions of the Linux kernel that utilize the mctp i3c driver.
What impact does CVE-2026-68314 have on network functionality?
CVE-2026-68314 can lead to improper handling of I3C bus notifications which may affect network communication stability.
Is there a workaround for CVE-2026-68314 if I can't update immediately?
There are no specific workarounds for CVE-2026-68314; it is recommended to apply the kernel update as soon as possible.