CVE-2024-36893

low-risk
Published 2024-05-30

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.

Do I need to act?

-
0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (9)

https://git.kernel.org/stable/c/2a07e6f0ad8a6e504a3912cfe8dc859b7d0740a5
Patch https://git.kernel.org/stable/c/789326cafbd1f67f424436b6bc8bdb887a364637
Patch https://git.kernel.org/stable/c/ae11f04b452b5205536e1c02d31f8045eba249dd
Patch https://git.kernel.org/stable/c/d56d2ca03cc22123fd7626967d096d8661324e57
Patch https://git.kernel.org/stable/c/fc2b655cb6dd2b381f1f284989721002e39b6b77
Patch https://git.kernel.org/stable/c/789326cafbd1f67f424436b6bc8bdb887a364637
Patch https://git.kernel.org/stable/c/ae11f04b452b5205536e1c02d31f8045eba249dd
Patch https://git.kernel.org/stable/c/d56d2ca03cc22123fd7626967d096d8661324e57
Patch https://git.kernel.org/stable/c/fc2b655cb6dd2b381f1f284989721002e39b6b77
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal