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
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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        "dateUpdated": "2026-05-11T19:21:29.824Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a04707f4596952049da05756c27398c34d9a1d36"
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        {
          "url": "https://git.kernel.org/stable/c/b4448816e6a565e08236a6009c6bf48c6836cdfd"
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          "url": "https://git.kernel.org/stable/c/b0a61359026b57a287a48fbb4ba1d097023eca3e"
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        {
          "url": "https://git.kernel.org/stable/c/7e43039a49c2da45edc1d9d7c9ede4003ab45a5f"
        }
      ],
      "title": "r6040: Fix kmemleak in probe and remove",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50545",
    "datePublished": "2025-10-07T15:21:09.288Z",
    "dateReserved": "2025-10-07T15:15:38.667Z",
    "dateUpdated": "2026-05-11T19:21:29.824Z",
    "state": "PUBLISHED"
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50545\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-07T16:15:38.943\",\"lastModified\":\"2026-02-26T23:17:18.533\",\"vulnStatus\":\"Analyzed\",\"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.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.36\",\"versionEndExcluding\":\"4.9.337\",\"matchCriteriaId\":\"12C52BFD-7A9B-4A05-8683-2D245EBF2ACF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.303\",\"matchCriteriaId\":\"1E7450AD-4739-46F0-B81B-C02E7B35A97B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.270\",\"matchCriteriaId\":\"AE8904A3-99BE-4E49-9682-1F90A6373F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.229\",\"matchCriteriaId\":\"A0C0D95E-414A-445E-941B-3EF6A4D3A093\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.163\",\"matchCriteriaId\":\"D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.86\",\"matchCriteriaId\":\"47237296-55D1-4ED4-8075-D00FC85A61EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.16\",\"matchCriteriaId\":\"C720A569-3D93-4D77-95F6-E2B3A3267D9F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.2\",\"matchCriteriaId\":\"77239F4B-6BB2-4B9E-A654-36A52396116C\"}]}]}],\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.