{"id":"CVE-2026-90215","summary":"mtd: ubi: Release device reference on busy detach","details":"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 busy. The busy return path drops\nubi-\u003eref_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.","modified":"2026-09-19T03:47:25.443276088Z","published":"2026-09-17T16:07:28.071Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90215.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90215.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90215"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5"},{"fixed":"87812858c4c8df979cb70bcd0040b925a543df6f"},{"fixed":"e065960366b55ab21e6c643c30dec2a41451900b"},{"fixed":"851c5e9a829d56cb0982965f07ef8966a6722884"},{"fixed":"31dd710cd84d5dd63c49f640d3a9f36c9699ca95"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90215.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90215.json"}}],"schema_version":"1.9.0"}