CVE-2026-31729

HIGH

MEDIUM Priority: 0.01 BB Relevance: 41/100

Published: 2026-05-01 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_notify_common() The connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a 7-bit field (0-127) that is used to index into the connector array in ucsi_connector_change(). However, the array is only allocated for the number of connectors reported by the device (typically 2-4 entries). A malicious or malfunctioning device could report an out-of-range connector number in the CCI, causing an out-of-bounds array access in ucsi_connector_change(). Add a bounds check in ucsi_notify_common(), the central point where CCI is parsed after arriving from hardware, so that bogus connector numbers are rejected before they propagate further.

Weakness Classification (1)

CWE-129

Affected Software (12)

Vendor	Product	Version
Linux	Linux	bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < f6dcbf2b024d55549959402f1db6c614e51d52cb
Linux	Linux	bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < f4e608fe12b7ac6a4a57176ab0296bb5a110a078
Linux	Linux	bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < 98429e9ec89a5e3a204112dfaa2dbe6ca28493a0
Linux	Linux	bdc62f2bae8fb0e8e99574de5232f0a3c54a27df < d2d8c17ac01a1b1f638ea5d340a884ccc5015186
Linux	Linux	5.5
linux	linux_kernel	5.5 – 6.12.81
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0