Vulnerability-Lookup

CVE-2025-38183 (GCVE-0-2025-38183)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2026-05-11 21:22

Title

net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get() Before calling lan743x_ptp_io_event_clock_get(), the 'channel' value is checked against the maximum value of PCI11X1X_PTP_IO_MAX_CHANNELS(8). This seems correct and aligns with the PTP interrupt status register (PTP_INT_STS) specifications. However, lan743x_ptp_io_event_clock_get() writes to ptp->extts[] with only LAN743X_PTP_N_EXTTS(4) elements, using channel as an index: lan743x_ptp_io_event_clock_get(..., u8 channel,...) { ... /* Update Local timestamp */ extts = &ptp->extts[channel]; extts->ts.tv_sec = sec; ... } To avoid an out-of-bounds write and utilize all the supported GPIO inputs, set LAN743X_PTP_N_EXTTS to 8. Detected using the static analysis tool - Svace.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/e8d48201a132f4aab…
https://git.kernel.org/stable/c/66bba1fd5bad548c0…
https://git.kernel.org/stable/c/41017bd66c533f7af…
https://git.kernel.org/stable/c/4da0d23516857230b…
https://git.kernel.org/stable/c/e353b0854d3a1a31c…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 60942c397af6094c04406b77982314dfe69ef3c4 , < e8d48201a132f4aab31351c19a802c5a5ae820fa (git) Affected: 60942c397af6094c04406b77982314dfe69ef3c4 , < 66bba1fd5bad548c03f7e42669a59f3f4d8211cc (git) Affected: 60942c397af6094c04406b77982314dfe69ef3c4 , < 41017bd66c533f7af912c58273c7dfd5de0065d4 (git) Affected: 60942c397af6094c04406b77982314dfe69ef3c4 , < 4da0d23516857230b8e9b3022e25422ee2e2ba80 (git) Affected: 60942c397af6094c04406b77982314dfe69ef3c4 , < e353b0854d3a1a31cb061df8d022fbfea53a0f24 (git)	guessed
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.142 , ≤ 6.1.* (semver) Unaffected: 6.6.95 , ≤ 6.6.* (semver) Unaffected: 6.12.35 , ≤ 6.12.* (semver) Unaffected: 6.15.4 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()\n\nBefore calling lan743x_ptp_io_event_clock_get(), the \u0027channel\u0027 value\nis checked against the maximum value of PCI11X1X_PTP_IO_MAX_CHANNELS(8).\nThis seems correct and aligns with the PTP interrupt status register\n(PTP_INT_STS) specifications.\n\nHowever, lan743x_ptp_io_event_clock_get() writes to ptp-\u003eextts[] with\nonly LAN743X_PTP_N_EXTTS(4) elements, using channel as an index:\n\n    lan743x_ptp_io_event_clock_get(..., u8 channel,...)\n    {\n        ...\n        /* Update Local timestamp */\n        extts = \u0026ptp-\u003eextts[channel];\n        extts-\u003ets.tv_sec = sec;\n        ...\n    }\n\nTo avoid an out-of-bounds write and utilize all the supported GPIO\ninputs, set LAN743X_PTP_N_EXTTS to 8.\n\nDetected using the static analysis tool - Svace."
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      "title": "net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()",
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Antes de llamar a lan743x_ptp_io_event_clock_get(), el valor del canal se compara con el valor m\u00e1ximo de PCI11X1X_PTP_IO_MAX_CHANNELS(8). Esto parece correcto y se ajusta a las especificaciones del registro de estado de interrupci\u00f3n PTP (PTP_INT_STS). Sin embargo, lan743x_ptp_io_event_clock_get() escribe en ptp-\u0026gt;extts[] solo con elementos LAN743X_PTP_N_EXTTS(4), usando el canal como \u00edndice: lan743x_ptp_io_event_clock_get(..., u8 channel,...) { ... /* Actualizar marca de tiempo local */ extts = \u0026amp;ptp-\u0026gt;extts[channel]; extts-\u0026gt;ts.tv_sec = sec; ... } Para evitar una escritura fuera de los l\u00edmites y utilizar todas las entradas GPIO compatibles, configure LAN743X_PTP_N_EXTTS en 8. Detectado usando la herramienta de an\u00e1lisis est\u00e1tico - 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Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T00:55:38+00:00",
      "cve": "CVE-2025-38183",
      "id": "CVE-2025-38183",
      "initial_release_date": "2025-07-04T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: lan743x: fix potential out-of-bounds write in lan743x_ptp_io_event_clock_get()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38183.json",
      "version": "3"
    }
  }
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2025-38183 (GCVE-0-2025-38183)

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