{"id":"CVE-2026-72391","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-72391","generatedAt":"2026-10-28T09:26:53.778Z","title":"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.…","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().","published":"2026-08-15T06:22:13.000Z","lastModified":"2026-08-17T06:19:06.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00215,"percentile":0.11756,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/2381bf3f484e8e4fd89a225445872ec14e036ab5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3183b6f5510c876a1c4b4a6bdc3d0ad8940fe742","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/86d379fcf1b79bdf4bc2ac891297f30f63d041d8","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f31efff9206f9f0adb853cad6916086aac4d5ef","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92dd9a522f01ef57f633a8c1953cf6d48ef2bcd5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d2c37f26d1a37f8177be5f354537f8ee3ec31cc2","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72391","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}