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

Status: published. Published: 2025-07-03. Updated: 2026-11-05.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < 24b24295464f25fb771d36ed558c7cd942119361 (affected, git); ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < db2a12ddd3a31f668137ff6a4befc1343c79cbc4 (affected, git); ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < 0b40aeaf83ca04d4c9801e235b7533400c8b5f17 (affected, git); ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < 66abe22017522dd56b820e41ca3a5b131a637001 (affected, git); ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < cdbabd316c5a4a9b0fda6aafe491e2db17fbb95d (affected, git); ≥ 7d272e63e0979d38a6256108adbe462d621c26c5; < 846992645b25ec4253167e3f931e4597eb84af56 (affected, git). Source: CNA: Linux
- Linux / Linux: 5.9 (affected); ≥ 0; < 5.9 (unaffected, semver); ≥ 5.15.192; ≤ 5.15.* (unaffected, semver); ≥ 6.1.142; ≤ 6.1.* (unaffected, semver); ≥ 6.6.94; ≤ 6.6.* (unaffected, semver); ≥ 6.12.34; ≤ 6.12.* (unaffected, semver); ≥ 6.15.3; ≤ 6.15.* (unaffected, semver); ≥ 6.16; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.18% as of 2026-11-05; percentile 7.39%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/24b24295464f25fb771d36ed558c7cd942119361 (CNA: Linux)

- https://git.kernel.org/stable/c/db2a12ddd3a31f668137ff6a4befc1343c79cbc4 (CNA: Linux)

- https://git.kernel.org/stable/c/0b40aeaf83ca04d4c9801e235b7533400c8b5f17 (CNA: Linux)

- https://git.kernel.org/stable/c/66abe22017522dd56b820e41ca3a5b131a637001 (CNA: Linux)

- https://git.kernel.org/stable/c/cdbabd316c5a4a9b0fda6aafe491e2db17fbb95d (CNA: Linux)

- https://git.kernel.org/stable/c/846992645b25ec4253167e3f931e4597eb84af56 (CNA: Linux)

- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (ADP: CVE)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2025-38148; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-38148; retrieved 2026-11-05; source updated Not reported

Revision: e97b1a0a8f503513208cd1b0ad8e765e67365051a9a40fc43ff72434bbd535ae

Canonical: https://y2.dev/cve/CVE-2025-38148

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