Use-after-free in Linux kernel - CVE-2026-80952
Published: September 13, 2026
Vulnerability identifier: #VU149450
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80952
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose kernel stack contents and cause a use-after-free.
The vulnerability exists due to improper device descriptor lifetime management in i3c_master_unregister_i3c_devs() when unregistering I3C devices. A local user can trigger device unregistration while a modalias is generated to disclose kernel stack contents and cause a use-after-free.
A racing modalias operation can observe a NULL device descriptor and use an uninitialized stack i3c_device_info structure.
Affected software
Linux kernel
How to mitigate CVE-2026-80952
Install security update from vendor's repository.