Description
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_connector_change() The connector number in a UCSI CCI notification is a 7-bit field supplied by the PPM. ucsi_connector_change() uses it to index the ucsi->connector[] array without checking it against the number of connectors the PPM reported at init time, so a buggy or malicious PPM (EC firmware, or an I2C-attached UCSI controller on the ccg / stm32g0 / glink transports) can drive schedule_work() on memory past the end of the array. Reject connector numbers that are zero or exceed cap.num_connectors before dereferencing the array.
Affected products
linux: linux kernel
References6
- git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433 Patch
- git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347 Patch
- git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9 Patch
- git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0 Patch
- git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd Patch
- git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 14 November 2026
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