{"api_version":"1","generated_at":"2026-08-02T20:25:46+00:00","cve":"CVE-2026-64509","urls":{"html":"https://cve.report/CVE-2026-64509","api":"https://cve.report/api/cve/CVE-2026-64509.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64509","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64509"},"summary":{"title":"rust: block: fix GenDisk cleanup paths","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust: block: fix GenDisk cleanup paths\n\nGenDiskBuilder::build() still has fallible work after\n__blk_mq_alloc_disk(), but its error path only recovers the\nforeign queue data. That leaks the temporary gendisk and\nrequest_queue until later teardown. If the caller moved the last\nArc<TagSet<T>> into build(), the leaked queue can retain blk-mq\nstate after the tag set is dropped.\n\nFix the pre-registration failure path by dropping the temporary\ngendisk reference with put_disk() before recovering queue_data,\nso disk_release() can tear down the owned queue.\n\nAlso pair GenDisk::drop() with put_disk() after del_gendisk().\nOnce a Rust GenDisk has been added with device_add_disk(),\ndel_gendisk() only unregisters it; the final gendisk reference\nstill has to be dropped to complete the release path.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:37","updated_at":"2026-07-25 10:17:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb","name":"https://git.kernel.org/stable/c/d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6822a2685b4da9a87efd1fce4b042678a31ff734","name":"https://git.kernel.org/stable/c/6822a2685b4da9a87efd1fce4b042678a31ff734","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2957771379fa335103a4b539db57bb2271e12142","name":"https://git.kernel.org/stable/c/2957771379fa335103a4b539db57bb2271e12142","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7636f26f77070a529c26d65afd217514ce85ce4","name":"https://git.kernel.org/stable/c/e7636f26f77070a529c26d65afd217514ce85ce4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64509","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64509","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3253aba3408aa4eb2e4e09365eede3e63ef7536b d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3253aba3408aa4eb2e4e09365eede3e63ef7536b e7636f26f77070a529c26d65afd217514ce85ce4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3253aba3408aa4eb2e4e09365eede3e63ef7536b 6822a2685b4da9a87efd1fce4b042678a31ff734 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3253aba3408aa4eb2e4e09365eede3e63ef7536b 2957771379fa335103a4b539db57bb2271e12142 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64509","cve":"CVE-2026-64509","epss":"0.001570000","percentile":"0.053050000","score_date":"2026-07-29","updated_at":"2026-07-30 00:09:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["rust/kernel/block/mq/gen_disk.rs"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb","status":"affected","version":"3253aba3408aa4eb2e4e09365eede3e63ef7536b","versionType":"git"},{"lessThan":"e7636f26f77070a529c26d65afd217514ce85ce4","status":"affected","version":"3253aba3408aa4eb2e4e09365eede3e63ef7536b","versionType":"git"},{"lessThan":"6822a2685b4da9a87efd1fce4b042678a31ff734","status":"affected","version":"3253aba3408aa4eb2e4e09365eede3e63ef7536b","versionType":"git"},{"lessThan":"2957771379fa335103a4b539db57bb2271e12142","status":"affected","version":"3253aba3408aa4eb2e4e09365eede3e63ef7536b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["rust/kernel/block/mq/gen_disk.rs"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust: block: fix GenDisk cleanup paths\n\nGenDiskBuilder::build() still has fallible work after\n__blk_mq_alloc_disk(), but its error path only recovers the\nforeign queue data. That leaks the temporary gendisk and\nrequest_queue until later teardown. If the caller moved the last\nArc<TagSet<T>> into build(), the leaked queue can retain blk-mq\nstate after the tag set is dropped.\n\nFix the pre-registration failure path by dropping the temporary\ngendisk reference with put_disk() before recovering queue_data,\nso disk_release() can tear down the owned queue.\n\nAlso pair GenDisk::drop() with put_disk() after del_gendisk().\nOnce a Rust GenDisk has been added with device_add_disk(),\ndel_gendisk() only unregisters it; the final gendisk reference\nstill has to be dropped to complete the release path."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:52:02.486Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb"},{"url":"https://git.kernel.org/stable/c/e7636f26f77070a529c26d65afd217514ce85ce4"},{"url":"https://git.kernel.org/stable/c/6822a2685b4da9a87efd1fce4b042678a31ff734"},{"url":"https://git.kernel.org/stable/c/2957771379fa335103a4b539db57bb2271e12142"}],"title":"rust: block: fix GenDisk cleanup paths","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64509","datePublished":"2026-07-25T08:52:02.486Z","dateReserved":"2026-07-19T15:36:31.793Z","dateUpdated":"2026-07-25T08:52:02.486Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:37","lastModifiedDate":"2026-07-25 10:17:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64509","Ordinal":"1","Title":"rust: block: fix GenDisk cleanup paths","CVE":"CVE-2026-64509","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64509","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nrust: block: fix GenDisk cleanup paths\n\nGenDiskBuilder::build() still has fallible work after\n__blk_mq_alloc_disk(), but its error path only recovers the\nforeign queue data. That leaks the temporary gendisk and\nrequest_queue until later teardown. If the caller moved the last\nArc<TagSet<T>> into build(), the leaked queue can retain blk-mq\nstate after the tag set is dropped.\n\nFix the pre-registration failure path by dropping the temporary\ngendisk reference with put_disk() before recovering queue_data,\nso disk_release() can tear down the owned queue.\n\nAlso pair GenDisk::drop() with put_disk() after del_gendisk().\nOnce a Rust GenDisk has been added with device_add_disk(),\ndel_gendisk() only unregisters it; the final gendisk reference\nstill has to be dropped to complete the release path.","Type":"Description","Title":"rust: block: fix GenDisk cleanup paths"}]}}}