github - ghsa-gwcx-q2c7-j3r5

GHSA-GWCX-Q2C7-J3R5

Vulnerability from github – Published: 2025-12-24 15:30 – Updated: 2025-12-24 15:30

Details

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

net: dsa: realtek: fix out-of-bounds access

The probe function sets priv->chip_data to (void )priv + sizeof(priv) with the expectation that priv has enough trailing space.

However, only realtek-smi actually allocated this chip_data space. Do likewise in realtek-mdio to fix out-of-bounds accesses.

These accesses likely went unnoticed so far, because of an (unused) buf[4096] member in struct realtek_priv, which caused kmalloc to round up the allocated buffer to a big enough size, so nothing of value was overwritten. With a different allocator (like in the barebox bootloader port of the driver) or with KASAN, the memory corruption becomes quickly apparent.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-54065"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:08Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: realtek: fix out-of-bounds access\n\nThe probe function sets priv-\u003echip_data to (void *)priv + sizeof(*priv)\nwith the expectation that priv has enough trailing space.\n\nHowever, only realtek-smi actually allocated this chip_data space.\nDo likewise in realtek-mdio to fix out-of-bounds accesses.\n\nThese accesses likely went unnoticed so far, because of an (unused)\nbuf[4096] member in struct realtek_priv, which caused kmalloc to\nround up the allocated buffer to a big enough size, so nothing of\nvalue was overwritten. With a different allocator (like in the barebox\nbootloader port of the driver) or with KASAN, the memory corruption\nbecomes quickly apparent.",
  "id": "GHSA-gwcx-q2c7-j3r5",
  "modified": "2025-12-24T15:30:36Z",
  "published": "2025-12-24T15:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54065"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b93eb564869321d0dffaf23fcc5c88112ed62466"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cc0f9bb99735d2b68fac68f37b585d615728ce5b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe668aa499b4b95425044ba11af9609db6ecf466"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-54065 (GCVE-0-2023-54065)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2025-12-24 12:23

Title

net: dsa: realtek: fix out-of-bounds access

Summary

In the Linux kernel, the following vulnerability has been resolved: net: dsa: realtek: fix out-of-bounds access The probe function sets priv->chip_data to (void *)priv + sizeof(*priv) with the expectation that priv has enough trailing space. However, only realtek-smi actually allocated this chip_data space. Do likewise in realtek-mdio to fix out-of-bounds accesses. These accesses likely went unnoticed so far, because of an (unused) buf[4096] member in struct realtek_priv, which caused kmalloc to round up the allocated buffer to a big enough size, so nothing of value was overwritten. With a different allocator (like in the barebox bootloader port of the driver) or with KASAN, the memory corruption becomes quickly apparent.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/cc0f9bb99735d2b68…
	https://git.kernel.org/stable/c/fe668aa499b4b9542…
	https://git.kernel.org/stable/c/b93eb564869321d0d…

Impacted products

Vendor

Product

Version

Linux

Affected: aac94001067da183455d6d37959892744fa01d9d , < cc0f9bb99735d2b68fac68f37b585d615728ce5b (git)
Affected: aac94001067da183455d6d37959892744fa01d9d , < fe668aa499b4b95425044ba11af9609db6ecf466 (git)
Affected: aac94001067da183455d6d37959892744fa01d9d , < b93eb564869321d0dffaf23fcc5c88112ed62466 (git)

Linux

Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.23 , ≤ 6.1.* (semver)
Unaffected: 6.2.10 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/realtek/realtek-mdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cc0f9bb99735d2b68fac68f37b585d615728ce5b",
              "status": "affected",
              "version": "aac94001067da183455d6d37959892744fa01d9d",
              "versionType": "git"
            },
            {
              "lessThan": "fe668aa499b4b95425044ba11af9609db6ecf466",
              "status": "affected",
              "version": "aac94001067da183455d6d37959892744fa01d9d",
              "versionType": "git"
            },
            {
              "lessThan": "b93eb564869321d0dffaf23fcc5c88112ed62466",
              "status": "affected",
              "version": "aac94001067da183455d6d37959892744fa01d9d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/realtek/realtek-mdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.23",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.10",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: realtek: fix out-of-bounds access\n\nThe probe function sets priv-\u003echip_data to (void *)priv + sizeof(*priv)\nwith the expectation that priv has enough trailing space.\n\nHowever, only realtek-smi actually allocated this chip_data space.\nDo likewise in realtek-mdio to fix out-of-bounds accesses.\n\nThese accesses likely went unnoticed so far, because of an (unused)\nbuf[4096] member in struct realtek_priv, which caused kmalloc to\nround up the allocated buffer to a big enough size, so nothing of\nvalue was overwritten. With a different allocator (like in the barebox\nbootloader port of the driver) or with KASAN, the memory corruption\nbecomes quickly apparent."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T12:23:10.745Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cc0f9bb99735d2b68fac68f37b585d615728ce5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe668aa499b4b95425044ba11af9609db6ecf466"
        },
        {
          "url": "https://git.kernel.org/stable/c/b93eb564869321d0dffaf23fcc5c88112ed62466"
        }
      ],
      "title": "net: dsa: realtek: fix out-of-bounds access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54065",
    "datePublished": "2025-12-24T12:23:10.745Z",
    "dateReserved": "2025-12-24T12:21:05.092Z",
    "dateUpdated": "2025-12-24T12:23:10.745Z",
    "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-GWCX-Q2C7-J3R5

CVE-2023-54065 (GCVE-0-2023-54065)

Tags

Sightings

Nomenclature