{"id":"CVE-2026-90215","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: ubi: Release device reference on busy detach\n\nubi_detach_mtd_dev() obtains a device reference through ubi_get_device()\nbefore checking whether the UBI device is bu…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: ubi: Release device reference on busy detach\n\nubi_detach_mtd_dev() obtains a device reference through ubi_get_device()\nbefore checking whether the UBI device is bu…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 87812858c4c8df979cb70bcd0040b925a543df6f","Linux >= 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < e065960366b55ab21e6c643c30dec2a41451900b","Linux >= 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 851c5e9a829d56cb0982965f07ef8966a6722884","Linux >= 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 31dd710cd84d5dd63c49f640d3a9f36c9699ca95","Linux 6.9"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:16.790","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90215","references":[{"url":"https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.856Z","epss":0.00168,"epssPercentile":0.06485,"slug":"CVE-2026-90215","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmtd: ubi: Release device reference on busy detach\n\nubi_detach_mtd_dev() obtains a device reference through ubi_get_device()\nbefore checking whether the UBI device is busy. The busy return path drops\nubi->ref_count but leaves the device reference held, so the device object\ncannot be released after a later detach.\n\nDrop the device reference before returning -EBUSY.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}