SB20260812212 - Missing Release of Resource after Effective Lifetime in Linux kernel net mctp driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-68314)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource shutdown in mctp_i3c_mod_init() in the mctp i3c driver when registering the i3c notifier and initializing existing buses before driver registration completes. A local user can trigger a driver registration failure to cause a denial of service.

The issue leaves a notifier pointing to a module that failed to load and leaks allocated bus objects.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/03d1057305ef17ac3f5936ac1580bc9a1a826e14
• https://git.kernel.org/stable/c/49d15cfab247c0f60ce1800bdcd66850beea7b3a
• https://git.kernel.org/stable/c/a40e83a34eaa2be64372286040696f04eabcd09f
• https://git.kernel.org/stable/c/a8bd8c109da5a87f0c5db0c23cf550d039fde77c