{"cve":"CVE-2026-72391","nvd":{"published":"2026-08-15T06:22:12.627","modified":"2026-08-17T06:19:05.587","status":"Received","description":"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->i2c_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->i2c_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().","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/2381bf3f484e8e4fd89a225445872ec14e036ab5","https://git.kernel.org/stable/c/3183b6f5510c876a1c4b4a6bdc3d0ad8940fe742","https://git.kernel.org/stable/c/86d379fcf1b79bdf4bc2ac891297f30f63d041d8","https://git.kernel.org/stable/c/8f31efff9206f9f0adb853cad6916086aac4d5ef","https://git.kernel.org/stable/c/92dd9a522f01ef57f633a8c1953cf6d48ef2bcd5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-72391","score":0.00215,"percentile":0.11852,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}