{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e85b1347ace677c3822c12d9332dfaaffe594da6"
            },
            {
              "fixed": "92dd9a522f01ef57f633a8c1953cf6d48ef2bcd5"
            },
            {
              "fixed": "d2c37f26d1a37f8177be5f354537f8ee3ec31cc2"
            },
            {
              "fixed": "3183b6f5510c876a1c4b4a6bdc3d0ad8940fe742"
            },
            {
              "fixed": "86d379fcf1b79bdf4bc2ac891297f30f63d041d8"
            },
            {
              "fixed": "2381bf3f484e8e4fd89a225445872ec14e036ab5"
            },
            {
              "fixed": "8f31efff9206f9f0adb853cad6916086aac4d5ef"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72391.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phy: sfp: free mii_bus in sfp_i2c_mdiobus_destroy\n\nsfp_i2c_mdiobus_create() allocates the I2C MDIO bus with mdio_i2c_alloc(),\na plain (non-devm) allocation, and registers it. sfp_i2c_mdiobus_destroy()\nonly unregisters the bus and clears sfp-\u003ei2c_mii without calling\nmdiobus_free(). As the only reference to the bus is then cleared, the\nstruct mii_bus is leaked.\n\nThis is hit whenever a copper/RollBall SFP module that instantiated an MDIO\nbus is removed: sfp_sm_main() takes the global teardown path and calls\nsfp_i2c_mdiobus_destroy(). sfp_cleanup(), on driver unbind, frees\nsfp-\u003ei2c_mii directly, which is why the leak only triggered on module\nhot-removal and not on unbind.\n\nFree the bus in sfp_i2c_mdiobus_destroy() to match the allocation done in\nsfp_i2c_mdiobus_create().",
  "id": "CVE-2026-72391",
  "modified": "2026-08-18T03:31:05.367030050Z",
  "published": "2026-08-15T05:56:19.842Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2381bf3f484e8e4fd89a225445872ec14e036ab5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3183b6f5510c876a1c4b4a6bdc3d0ad8940fe742"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86d379fcf1b79bdf4bc2ac891297f30f63d041d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f31efff9206f9f0adb853cad6916086aac4d5ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92dd9a522f01ef57f633a8c1953cf6d48ef2bcd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2c37f26d1a37f8177be5f354537f8ee3ec31cc2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72391.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72391"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: phy: sfp: free mii_bus in sfp_i2c_mdiobus_destroy"
}