CVE-2023-53049 Information

Description

In the Linux kernel the following vulnerability has been resolved:

usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()

When ucsi_init() fails ucsi->connector is NULL yet in case of ucsi_acpi we may still get events which cause the ucs_acpi code to call ucsi_connector_change() which then derefs the NULL ucsi->connector pointer.

Fix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init() has succeeded so that ucsi_connector_change() ignores the events because UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask.

Reference

https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978 https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693 https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44 https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0 https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764