PT-2026-8141 · Linux+2 · Linux Kernel+2
Published
2026-01-01
·
Updated
2026-05-26
·
CVE-2026-23146
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A flaw exists in the Bluetooth implementation of the Linux kernel related to a null pointer dereference within the
hci uart write work() function. The issue arises from a race condition where the HCI UART PROTO INIT flag is set before the hu->priv structure is initialized. A TTY write wakeup can then schedule work to be performed before initialization is complete, leading to a null pointer dereference when proto->dequeue() attempts to access the uninitialized hu->priv. The vulnerable function is hci uart write work(). The hci uart set proto() function sets the HCI UART PROTO INIT flag, and hci uart register dev() calls proto->open() to initialize hu->priv. The hci uart tx wakeup() function schedules work before hu->priv is initialized.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
NULL Pointer Dereference
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu