CVE-2026-63958
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.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (2)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Linux | Linux | — | c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f < cea949203faef9cb783adc7b978cce056271e057, c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f < 156b6f0aec6108909b0c4aedc78865b12766b347, c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f < bd24d92af4ae021b6209f28e9a57e1bf2260d4fd, c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f < 0edd1e21587b0483c7ceb993b9fb9668bbef7433 … |
| Linux | Linux | — | 4.13, 0 < 4.13, 6.1.176 ≤ 6.1.*, 6.6.143 ≤ 6.6.* … |
References (6)
- https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057
- https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347
- https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd
- https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433
- https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0
- https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9