usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764