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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-63958

usb: typec: ucsi: validate connector number in ucsi_connector_change()

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Status
Published
Published
Updated
Assigning organization
Linux

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < cea949203faef9cb783adc7b978cce056271e057affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < 156b6f0aec6108909b0c4aedc78865b12766b347affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < bd24d92af4ae021b6209f28e9a57e1bf2260d4fdaffected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < 0edd1e21587b0483c7ceb993b9fb9668bbef7433affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < 5af2719b460ab904c504fc069d1dd2a3aa2b22b0affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to < 288a81a8507052bcfbf884d39a463c44c42c5fd9affected

Linux Linux

Default version status: affected

  • 4.13affected
  • 0 to < 4.13unaffected
  • 6.1.176 to ≤ 6.1.*unaffected
  • 6.6.143 to ≤ 6.6.*unaffected
  • 6.12.93 to ≤ 6.12.*unaffected
  • 6.18.35 to ≤ 6.18.*unaffected
  • 7.0.12 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References