CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Check for port partner validity before consuming it typec_register_partner() does not guarantee partner registration to always succeed. In the event of failure, port->partner is set to the error value or NULL. Given that port->partner validity is not checked, this results in the following crash: Unable to handle kernel NULL pointer dereference at virtual address xx pc : run_state_machine+0x1bc8/0x1c08 lr : run_state_machine+0x1b90/0x1c08 … Call trace: run_state_machine+0x1bc8/0x1c08 tcpm_state_machine_work+0x94/0xe4 kthread_worker_fn+0x118/0x328 kthread+0x1d0/0x23c ret_from_fork+0x10/0x20 To prevent the crash, check for port->partner validity before derefencing it in all the call sites.
git.kernel.org/linus/ae11f04b452b5205536e1c02d31f8045eba249dd
git.kernel.org/stable/c/789326cafbd1f67f424436b6bc8bdb887a364637
git.kernel.org/stable/c/ae11f04b452b5205536e1c02d31f8045eba249dd
git.kernel.org/stable/c/d56d2ca03cc22123fd7626967d096d8661324e57
git.kernel.org/stable/c/fc2b655cb6dd2b381f1f284989721002e39b6b77
ubuntu.com/security/CVE-2024-36893
www.cve.org/CVERecord?id=CVE-2024-36893