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CVE-2022-50545 (GCVE-0-2022-50545)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2026-05-11 19:21
VLAI
Title
r6040: Fix kmemleak in probe and remove
Summary
In the Linux kernel, the following vulnerability has been resolved: r6040: Fix kmemleak in probe and remove There is a memory leaks reported by kmemleak: unreferenced object 0xffff888116111000 (size 2048): comm "modprobe", pid 817, jiffies 4294759745 (age 76.502s) hex dump (first 32 bytes): 00 c4 0a 04 81 88 ff ff 08 10 11 16 81 88 ff ff ................ 08 10 11 16 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff815bcd82>] kmalloc_trace+0x22/0x60 [<ffffffff827e20ee>] phy_device_create+0x4e/0x90 [<ffffffff827e6072>] get_phy_device+0xd2/0x220 [<ffffffff827e7844>] mdiobus_scan+0xa4/0x2e0 [<ffffffff827e8be2>] __mdiobus_register+0x482/0x8b0 [<ffffffffa01f5d24>] r6040_init_one+0x714/0xd2c [r6040] ... The problem occurs in probe process as follows: r6040_init_one: mdiobus_register mdiobus_scan <- alloc and register phy_device, the reference count of phy_device is 3 r6040_mii_probe phy_connect <- connect to the first phy_device, so the reference count of the first phy_device is 4, others are 3 register_netdev <- fault inject succeeded, goto error handling path // error handling path err_out_mdio_unregister: mdiobus_unregister(lp->mii_bus); err_out_mdio: mdiobus_free(lp->mii_bus); <- the reference count of the first phy_device is 1, it is not released and other phy_devices are released // similarly, the remove process also has the same problem The root cause is traced to the phy_device is not disconnected when removes one r6040 device in r6040_remove_one() or on error handling path after r6040_mii probed successfully. In r6040_mii_probe(), a net ethernet device is connected to the first PHY device of mii_bus, in order to notify the connected driver when the link status changes, which is the default behavior of the PHY infrastructure to handle everything. Therefore the phy_device should be disconnected when removes one r6040 device or on error handling path. Fix it by adding phy_disconnect() when removes one r6040 device or on error handling path after r6040_mii probed successfully.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < a04707f4596952049da05756c27398c34d9a1d36 (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < b4448816e6a565e08236a6009c6bf48c6836cdfd (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < 2ce242e1b9ad31c1f68496b3548e407a8cb2c07d (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < b0a61359026b57a287a48fbb4ba1d097023eca3e (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < 3d5f83a62e8235d235534b3dc6f197d8a822c269 (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < 9b5b50329e2e966831a7237dd6949e7b5362a49a (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < ad2c8f25457ca9a81e7e958148cbc26600ce3071 (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < 5944c25c67de54e0aa53623e1e1af3bf8b16ed44 (git)
Affected: 3831861b4ad8fd0ad7110048eb3e155628799d2b , < 7e43039a49c2da45edc1d9d7c9ede4003ab45a5f (git)
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Linux Linux Affected: 2.6.36
Unaffected: 0 , < 2.6.36 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nr6040: Fix kmemleak in probe and remove\n\nThere is a memory leaks reported by kmemleak:\n\n  unreferenced object 0xffff888116111000 (size 2048):\n    comm \"modprobe\", pid 817, jiffies 4294759745 (age 76.502s)\n    hex dump (first 32 bytes):\n      00 c4 0a 04 81 88 ff ff 08 10 11 16 81 88 ff ff  ................\n      08 10 11 16 81 88 ff ff 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003cffffffff815bcd82\u003e] kmalloc_trace+0x22/0x60\n      [\u003cffffffff827e20ee\u003e] phy_device_create+0x4e/0x90\n      [\u003cffffffff827e6072\u003e] get_phy_device+0xd2/0x220\n      [\u003cffffffff827e7844\u003e] mdiobus_scan+0xa4/0x2e0\n      [\u003cffffffff827e8be2\u003e] __mdiobus_register+0x482/0x8b0\n      [\u003cffffffffa01f5d24\u003e] r6040_init_one+0x714/0xd2c [r6040]\n      ...\n\nThe problem occurs in probe process as follows:\n  r6040_init_one:\n    mdiobus_register\n      mdiobus_scan    \u003c- alloc and register phy_device,\n                         the reference count of phy_device is 3\n    r6040_mii_probe\n      phy_connect     \u003c- connect to the first phy_device,\n                         so the reference count of the first\n                         phy_device is 4, others are 3\n    register_netdev   \u003c- fault inject succeeded, goto error handling path\n\n    // error handling path\n    err_out_mdio_unregister:\n      mdiobus_unregister(lp-\u003emii_bus);\n    err_out_mdio:\n      mdiobus_free(lp-\u003emii_bus);    \u003c- the reference count of the first\n                                       phy_device is 1, it is not released\n                                       and other phy_devices are released\n  // similarly, the remove process also has the same problem\n\nThe root cause is traced to the phy_device is not disconnected when\nremoves one r6040 device in r6040_remove_one() or on error handling path\nafter r6040_mii probed successfully. In r6040_mii_probe(), a net ethernet\ndevice is connected to the first PHY device of mii_bus, in order to\nnotify the connected driver when the link status changes, which is the\ndefault behavior of the PHY infrastructure to handle everything.\nTherefore the phy_device should be disconnected when removes one r6040\ndevice or on error handling path.\n\nFix it by adding phy_disconnect() when removes one r6040 device or on\nerror handling path after r6040_mii probed successfully."
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                    "versionEndExcluding": "5.15.86",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F",
                    "versionEndExcluding": "6.0.16",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C",
                    "versionEndExcluding": "6.1.2",
                    "versionStartIncluding": "6.1",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nr6040: Fix kmemleak in probe and remove\n\nThere is a memory leaks reported by kmemleak:\n\n  unreferenced object 0xffff888116111000 (size 2048):\n    comm \"modprobe\", pid 817, jiffies 4294759745 (age 76.502s)\n    hex dump (first 32 bytes):\n      00 c4 0a 04 81 88 ff ff 08 10 11 16 81 88 ff ff  ................\n      08 10 11 16 81 88 ff ff 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [\u003cffffffff815bcd82\u003e] kmalloc_trace+0x22/0x60\n      [\u003cffffffff827e20ee\u003e] phy_device_create+0x4e/0x90\n      [\u003cffffffff827e6072\u003e] get_phy_device+0xd2/0x220\n      [\u003cffffffff827e7844\u003e] mdiobus_scan+0xa4/0x2e0\n      [\u003cffffffff827e8be2\u003e] __mdiobus_register+0x482/0x8b0\n      [\u003cffffffffa01f5d24\u003e] r6040_init_one+0x714/0xd2c [r6040]\n      ...\n\nThe problem occurs in probe process as follows:\n  r6040_init_one:\n    mdiobus_register\n      mdiobus_scan    \u003c- alloc and register phy_device,\n                         the reference count of phy_device is 3\n    r6040_mii_probe\n      phy_connect     \u003c- connect to the first phy_device,\n                         so the reference count of the first\n                         phy_device is 4, others are 3\n    register_netdev   \u003c- fault inject succeeded, goto error handling path\n\n    // error handling path\n    err_out_mdio_unregister:\n      mdiobus_unregister(lp-\u003emii_bus);\n    err_out_mdio:\n      mdiobus_free(lp-\u003emii_bus);    \u003c- the reference count of the first\n                                       phy_device is 1, it is not released\n                                       and other phy_devices are released\n  // similarly, the remove process also has the same problem\n\nThe root cause is traced to the phy_device is not disconnected when\nremoves one r6040 device in r6040_remove_one() or on error handling path\nafter r6040_mii probed successfully. In r6040_mii_probe(), a net ethernet\ndevice is connected to the first PHY device of mii_bus, in order to\nnotify the connected driver when the link status changes, which is the\ndefault behavior of the PHY infrastructure to handle everything.\nTherefore the phy_device should be disconnected when removes one r6040\ndevice or on error handling path.\n\nFix it by adding phy_disconnect() when removes one r6040 device or on\nerror handling path after r6040_mii probed successfully."
          }
        ],
        "id": "CVE-2022-50545",
        "lastModified": "2026-06-17T05:23:45.753",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-10-07T16:15:38.943",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2ce242e1b9ad31c1f68496b3548e407a8cb2c07d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3d5f83a62e8235d235534b3dc6f197d8a822c269"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5944c25c67de54e0aa53623e1e1af3bf8b16ed44"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7e43039a49c2da45edc1d9d7c9ede4003ab45a5f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9b5b50329e2e966831a7237dd6949e7b5362a49a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a04707f4596952049da05756c27398c34d9a1d36"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ad2c8f25457ca9a81e7e958148cbc26600ce3071"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b0a61359026b57a287a48fbb4ba1d097023eca3e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b4448816e6a565e08236a6009c6bf48c6836cdfd"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-401"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:36:56+00:00",
      "cve": "CVE-2022-50545",
      "id": "CVE-2022-50545",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: r6040: Fix kmemleak in probe and remove",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50545.json",
      "version": "3"
    }
  }
}



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