---
id: "CVE-2026-98760"
kind: "vulnerability"
aliases: ["CVE-2026-98760"]
title: "Linux kernel: USB Type-C TPS6598x driver leaves stack garbage in partner registration"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["embedded", "linux-kernel", "runtime", "usb-typec"]
not_affected_if: ["no-tps6598x-hardware"]
published_at: "2026-10-18T16:17:29+00:00"
first_seen_at: "2026-10-23T21:57:16+00:00"
updated_at: "2026-10-25T05:16:47+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98760", "first_seen_at": "2026-10-23T21:57:16+00:00"}]
---

# Linux kernel: USB Type-C TPS6598x driver leaves stack garbage in partner registration

The Linux kernel's TPS6598x USB Type-C port driver registers a partner descriptor from uninitialized stack memory, so callback pointers and fields can hold garbage. The bad function pointers can be invoked when a USB device is linked to the port, and sysfs exposes leaked stack data.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- Update the Linux kernel to a release that includes the upstream fix zeroing the typec_partner_desc in tps6598x_connect() (version unknown from sources)
- unknown

## Timeline

- 2026-10-23T21:57:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98760

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: tipd: fix uninitialized typec_partner_desc in tps6598x_connect()

tps6598x_connect() passes a stack-allocated typec_partner_desc to
typec_register_partner() after initializing only usb_pd, accessory and
identity.

typec_register_partner() copies attach and deattach from the descriptor
into the partner. With those fields left unset, garbage function pointers
may be stored and later invoked from typec_partner_link_device() when a USB
device is linked to the port. Uninitialized pd_revision and usb_capability
similarly leak stack data through partner sysfs.

Zero-initialize the descriptor so optional callbacks remain NULL and the
remaining fields are zero.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_