{"api_version":"1","generated_at":"2026-05-28T06:37:39+00:00","cve":"CVE-2026-45975","urls":{"html":"https://cve.report/CVE-2026-45975","api":"https://cve.report/api/cve/CVE-2026-45975.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-45975","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45975"},"summary":{"title":"ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd\n\nstruct ublksrv_ctrl_cmd is part of the io_uring_sqe, which may lie in\nuserspace-mapped memory. It's racy to access its fields with normal\nloads, as userspace may write to them concurrently. Use READ_ONCE() to\ncopy the ublksrv_ctrl_cmd from the io_uring_sqe to the stack. Use the\nlocal copy in place of the one in the io_uring_sqe.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-27 14:17:14","updated_at":"2026-05-27 14:48:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ed9f54cc1e335096733aed03c2a46de3d58922ed","name":"https://git.kernel.org/stable/c/ed9f54cc1e335096733aed03c2a46de3d58922ed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ce63eda3e6d36e2c253febee1c8421ecbd1a680e","name":"https://git.kernel.org/stable/c/ce63eda3e6d36e2c253febee1c8421ecbd1a680e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45975","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45975","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 87213b0d847cd300285b5545598e0548baeb5208 ce63eda3e6d36e2c253febee1c8421ecbd1a680e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 87213b0d847cd300285b5545598e0548baeb5208 ed9f54cc1e335096733aed03c2a46de3d58922ed git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/block/ublk_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ce63eda3e6d36e2c253febee1c8421ecbd1a680e","status":"affected","version":"87213b0d847cd300285b5545598e0548baeb5208","versionType":"git"},{"lessThan":"ed9f54cc1e335096733aed03c2a46de3d58922ed","status":"affected","version":"87213b0d847cd300285b5545598e0548baeb5208","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/block/ublk_drv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd\n\nstruct ublksrv_ctrl_cmd is part of the io_uring_sqe, which may lie in\nuserspace-mapped memory. It's racy to access its fields with normal\nloads, as userspace may write to them concurrently. Use READ_ONCE() to\ncopy the ublksrv_ctrl_cmd from the io_uring_sqe to the stack. Use the\nlocal copy in place of the one in the io_uring_sqe."}],"providerMetadata":{"dateUpdated":"2026-05-27T12:18:33.939Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ce63eda3e6d36e2c253febee1c8421ecbd1a680e"},{"url":"https://git.kernel.org/stable/c/ed9f54cc1e335096733aed03c2a46de3d58922ed"}],"title":"ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-45975","datePublished":"2026-05-27T12:18:33.939Z","dateReserved":"2026-05-13T15:03:33.090Z","dateUpdated":"2026-05-27T12:18:33.939Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:17:14","lastModifiedDate":"2026-05-27 14:48:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"45975","Ordinal":"1","Title":"ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd","CVE":"CVE-2026-45975","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"45975","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd\n\nstruct ublksrv_ctrl_cmd is part of the io_uring_sqe, which may lie in\nuserspace-mapped memory. It's racy to access its fields with normal\nloads, as userspace may write to them concurrently. Use READ_ONCE() to\ncopy the ublksrv_ctrl_cmd from the io_uring_sqe to the stack. Use the\nlocal copy in place of the one in the io_uring_sqe.","Type":"Description","Title":"ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd"}]}}}