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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-63958 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0edd1e21587b0483c7ceb993b9fb9668bbef7433 kernel.org
https://git.kernel.org/stable/c/156b6f0aec6108909b0c4aedc78865b12766b347 kernel.org
https://git.kernel.org/stable/c/288a81a8507052bcfbf884d39a463c44c42c5fd9 kernel.org
https://git.kernel.org/stable/c/5af2719b460ab904c504fc069d1dd2a3aa2b22b0 kernel.org
https://git.kernel.org/stable/c/bd24d92af4ae021b6209f28e9a57e1bf2260d4fd kernel.org
https://git.kernel.org/stable/c/cea949203faef9cb783adc7b978cce056271e057 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-63958
NVD Published Date:
07/19/2026
NVD Last Modified:
07/20/2026
Source:
kernel.org