github - ghsa-g4v3-m8fj-mwj2

GHSA-G4V3-M8FJ-MWJ2

Vulnerability from github – Published: 2025-12-04 18:30 – Updated: 2025-12-04 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

net: phy: micrel: always set shared->phydev for LAN8814

Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP clock gets actually set, otherwise the function will return before setting it.

This is an issue as shared->phydev is unconditionally being used when IRQ is being handled, especially in lan8814_gpio_process_cap and since it was not set it will cause a NULL pointer exception and crash the kernel.

So, simply always set shared->phydev to avoid the NULL pointer exception.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-40239"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-04T16:16:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: micrel: always set shared-\u003ephydev for LAN8814\n\nCurrently, during the LAN8814 PTP probe shared-\u003ephydev is only set if PTP\nclock gets actually set, otherwise the function will return before setting\nit.\n\nThis is an issue as shared-\u003ephydev is unconditionally being used when IRQ\nis being handled, especially in lan8814_gpio_process_cap and since it was\nnot set it will cause a NULL pointer exception and crash the kernel.\n\nSo, simply always set shared-\u003ephydev to avoid the NULL pointer exception.",
  "id": "GHSA-g4v3-m8fj-mwj2",
  "modified": "2025-12-04T18:30:52Z",
  "published": "2025-12-04T18:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40239"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40239 (GCVE-0-2025-40239)

Vulnerability from cvelistv5 – Published: 2025-12-04 15:31 – Updated: 2025-12-04 15:31

Summary

In the Linux kernel, the following vulnerability has been resolved: net: phy: micrel: always set shared->phydev for LAN8814 Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP clock gets actually set, otherwise the function will return before setting it. This is an issue as shared->phydev is unconditionally being used when IRQ is being handled, especially in lan8814_gpio_process_cap and since it was not set it will cause a NULL pointer exception and crash the kernel. So, simply always set shared->phydev to avoid the NULL pointer exception.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/da1ef8e9eb5d4a12b…
	https://git.kernel.org/stable/c/b093b06826b836c28…
	https://git.kernel.org/stable/c/399d10934740ae8cd…

Impacted products

Vendor

Product

Version

Linux

Affected: b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 , < da1ef8e9eb5d4a12bec32d11636e521e7d529b9e (git)
Affected: b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 , < b093b06826b836c2824858669db080c190c04715 (git)
Affected: b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 , < 399d10934740ae8cdaa4e3245f7c5f6c332da844 (git)

Linux

Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/phy/micrel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "da1ef8e9eb5d4a12bec32d11636e521e7d529b9e",
              "status": "affected",
              "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746",
              "versionType": "git"
            },
            {
              "lessThan": "b093b06826b836c2824858669db080c190c04715",
              "status": "affected",
              "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746",
              "versionType": "git"
            },
            {
              "lessThan": "399d10934740ae8cdaa4e3245f7c5f6c332da844",
              "status": "affected",
              "version": "b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/phy/micrel.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.56",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.6",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: micrel: always set shared-\u003ephydev for LAN8814\n\nCurrently, during the LAN8814 PTP probe shared-\u003ephydev is only set if PTP\nclock gets actually set, otherwise the function will return before setting\nit.\n\nThis is an issue as shared-\u003ephydev is unconditionally being used when IRQ\nis being handled, especially in lan8814_gpio_process_cap and since it was\nnot set it will cause a NULL pointer exception and crash the kernel.\n\nSo, simply always set shared-\u003ephydev to avoid the NULL pointer exception."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-04T15:31:28.941Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715"
        },
        {
          "url": "https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844"
        }
      ],
      "title": "net: phy: micrel: always set shared-\u003ephydev for LAN8814",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40239",
    "datePublished": "2025-12-04T15:31:28.941Z",
    "dateReserved": "2025-04-16T07:20:57.181Z",
    "dateUpdated": "2025-12-04T15:31:28.941Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-G4V3-M8FJ-MWJ2

CVE-2025-40239 (GCVE-0-2025-40239)

Tags

Sightings

Nomenclature