Improper locking in Linux kernel - CVE-2026-80954
Published: September 12, 2026
Vulnerability identifier: #VU149434
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80954
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger an unlocked dereference of a device descriptor.
The vulnerability exists due to improper locking in i3c_device_get_supported_xfer_mode() when obtaining the master controller from dev->desc without holding bus->lock. A local user can invoke i3c_device_get_supported_xfer_mode() to trigger an unlocked dereference of a device descriptor.
Affected software
Linux kernel
How to mitigate CVE-2026-80954
Install security update from vendor's repository.