Riskcovery

CVE-2026-63958

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

State
Published
Severity
Not scored
Published
Jul 19, 2026
Updated
Jul 20, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before cea949203faef9cb783adc7b978cce056271e057Affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before 156b6f0aec6108909b0c4aedc78865b12766b347Affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before bd24d92af4ae021b6209f28e9a57e1bf2260d4fdAffected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before 0edd1e21587b0483c7ceb993b9fb9668bbef7433Affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before 5af2719b460ab904c504fc069d1dd2a3aa2b22b0Affected
  • c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f to before 288a81a8507052bcfbf884d39a463c44c42c5fd9Affected
LinuxLinux
  • 4.13Affected
  • before 4.13Not affected
  • 6.1.176 through 6.1.*Not affected
  • 6.6.143 through 6.6.*Not affected
  • 6.12.93 through 6.12.*Not affected
  • 6.18.35 through 6.18.*Not affected
  • 7.0.12 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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