{"id":"CVE-2026-90215","state":"PUBLISHED","title":"mtd: ubi: Release device reference on busy detach","description":"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->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.","publishedAt":"2026-09-17T16:07:28.071Z","updatedAt":"2026-10-19T08:59:51.207Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"87812858c4c8df979cb70bcd0040b925a543df6f","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"e065960366b55ab21e6c643c30dec2a41451900b","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"851c5e9a829d56cb0982965f07ef8966a6722884","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"31dd710cd84d5dd63c49f640d3a9f36c9699ca95","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c"]}],"references":["https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f","https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b","https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884","https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90215.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90215","state":"PUBLISHED","datePublished":"2026-09-17T16:07:28.071Z","dateUpdated":"2026-10-19T08:59:51.207Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.793Z"},"containers":{"cna":{"title":"mtd: ubi: Release device reference on busy detach","descriptions":[{"lang":"en","value":"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->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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"87812858c4c8df979cb70bcd0040b925a543df6f","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"e065960366b55ab21e6c643c30dec2a41451900b","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"851c5e9a829d56cb0982965f07ef8966a6722884","versionType":"git"},{"version":"7e84c961b2eb062d2f47037dcca52dcd1d3615b5","status":"affected","lessThan":"31dd710cd84d5dd63c49f640d3a9f36c9699ca95","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/ubi/build.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f"},{"url":"https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b"},{"url":"https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884"},{"url":"https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:59:51.207Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}