ghsa-xqr4-wc4c-36xj
Vulnerability from github
Published
2024-09-04 21:30
Modified
2024-09-05 18:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

net: dsa: bcm_sf2: Fix a possible memory leak in bcm_sf2_mdio_register()

bcm_sf2_mdio_register() calls of_phy_find_device() and then phy_device_remove() in a loop to remove existing PHY devices. of_phy_find_device() eventually calls bus_find_device(), which calls get_device() on the returned struct device * to increment the refcount. The current implementation does not decrement the refcount, which causes memory leak.

This commit adds the missing phy_device_free() call to decrement the refcount via put_device() to balance the refcount.

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{
   affected: [],
   aliases: [
      "CVE-2024-44971",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-401",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-09-04T19:15:31Z",
      severity: "MODERATE",
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: bcm_sf2: Fix a possible memory leak in bcm_sf2_mdio_register()\n\nbcm_sf2_mdio_register() calls of_phy_find_device() and then\nphy_device_remove() in a loop to remove existing PHY devices.\nof_phy_find_device() eventually calls bus_find_device(), which calls\nget_device() on the returned struct device * to increment the refcount.\nThe current implementation does not decrement the refcount, which causes\nmemory leak.\n\nThis commit adds the missing phy_device_free() call to decrement the\nrefcount via put_device() to balance the refcount.",
   id: "GHSA-xqr4-wc4c-36xj",
   modified: "2024-09-05T18:30:56Z",
   published: "2024-09-04T21:30:32Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-44971",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/7feef10768ea71d468d9bbc1e0d14c461876768c",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/a7d2808d67570e6acae45c2a96e0d59986888e4c",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/b7b8d9f5e679af60c94251fd6728dde34be69a71",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/c05516c072903f6fb9134b8e7e1ad4bffcdc4819",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/e3862093ee93fcfbdadcb7957f5f8974fffa806a",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/f3d5efe18a11f94150fee8b3fda9d62079af640a",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
         type: "CVSS_V3",
      },
   ],
}


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