Not yet scoredPublished Jul 19, 2026

CVE-2026-63958usb: typec: ucsi: validate connector number in ucsi_connector_change()

Updated under an hour ago (Oct 28, 2026, 8:30 AM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Awaiting Analysis
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before cea949203faef9cb783adc7b978cce056271e057; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 156b6f0aec6108909b0c4aedc78865b12766b347; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before bd24d92af4ae021b6209f28e9a57e1bf2260d4fd; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 0edd1e21587b0483c7ceb993b9fb9668bbef7433; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 5af2719b460ab904c504fc069d1dd2a3aa2b22b0; from c1b0bc2dabfa884dea49c02adaf3cd6b52b33d2f before 288a81a8507052bcfbf884d39a463c44c42c5fd9	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.