CVE-2025-38262

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

tty: serial: uartlite: register uart driver in init

When two instances of uart devices are probing, a concurrency race can

occur. If one thread calls uart_register_driver function, which first

allocates and assigns memory to 'uart_state' member of uart_driver

structure, the other instance can bypass uart driver registration and

call ulite_assign. This calls uart_add_one_port, which expects the uart

driver to be fully initialized. This leads to a kernel panic due to a

null pointer dereference:

[ 8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8

[ 8.156982] #PF: supervisor write access in kernel mode

[ 8.156984] #PF: error_code(0x0002) - not-present page

[ 8.156986] PGD 0 P4D 0

...

[ 8.180668] RIP: 0010:mutex_lock+0x19/0x30

[ 8.188624] Call Trace:

[ 8.188629] ? __die_body.cold+0x1a/0x1f

[ 8.195260] ? page_fault_oops+0x15c/0x290

[ 8.209183] ? __irq_resolve_mapping+0

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References