---
id: "CVE-2026-98605"
kind: "vulnerability"
aliases: ["CVE-2026-98605"]
title: "Linux kernel: Samsung DSI display driver mishandles TE GPIO lifetime"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["arm-embedded", "drm-display", "exynos", "infrastructure", "linux-kernel"]
not_affected_if: ["no-samsung-dsim-hardware"]
published_at: "2026-10-18T16:17:13+00:00"
first_seen_at: "2026-10-23T21:57:16+00:00"
updated_at: "2026-10-25T05:21:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98605", "first_seen_at": "2026-10-23T21:57:16+00:00"}]
---

# Linux kernel: Samsung DSI display driver mishandles TE GPIO lifetime

The Samsung DSI display bridge driver in the Linux kernel mixed a managed GPIO acquisition with explicit releases, so repeated host attach and detach could request a GPIO that was not released. The sources do not describe an attacker outcome.

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

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98605

## From the sources

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

drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach

When the Exynos DSI driver was generalized into samsung-dsim, the TE
GPIO acquisition was switched from gpiod_get_optional() to
devm_gpiod_get_optional() while keeping the matching gpiod_put() calls.
That combination is wrong for a managed descriptor.

However, dropping the puts and keeping the managed get is also wrong:
samsung_dsim_register_te_irq() runs from the DSI host attach callback,
and host detach/reattach can happen without destroying the device that
owns the managed action. A second attach would then request the GPIO
again without having released it.

Switch back to a non-managed gpiod_get_optional() and keep the explicit
gpiod_put() on the request_irq() error path and in
samsung_dsim_unregister_te_irq().

[Luca: remove unnecessary comment]

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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_