{"apiVersion":"1.0","identifier":"CVE-2026-72391","description":"In the Linux kernel, the following vulnerability has been resolved: net: phy: sfp: free mii_bus in sfp_i2c_mdiobus_destroy sfp_i2c_mdiobus_create() allocates the I2C MDIO bus with mdio_i2c_alloc(), a plain (non-devm) allocation, and registers it. sfp_i2c_mdiobus_destroy() only unregisters the bus and clears sfp->i2c_mii without calling mdiobus_free(). As the only reference to the bus is then cleared, the struct mii_bus is leaked. This is hit whenever a copper/RollBall SFP module that instantiated an MDIO bus is removed: sfp_sm_main() takes the global teardown path and calls sfp_i2c_mdiobus_destroy(). sfp_cleanup(), on driver unbind, frees sfp->i2c_mii directly, which is why the leak only triggered on module hot-removal and not on unbind. Free the bus in sfp_i2c_mdiobus_destroy() to match the allocation done in sfp_i2c_mdiobus_create().","publishedAt":"2026-08-15T06:22:12","lastModifiedAt":"2026-08-17T06:19:05","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72391","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00205,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72391","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72391","en":"https://www.redsauce.net/en/cves/CVE-2026-72391","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72391","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72391","de":"https://www.redsauce.net/de/cves/CVE-2026-72391","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72391","el":"https://www.redsauce.net/el/cves/CVE-2026-72391"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72391"}}