{"id":"CVE-2026-45975","summary":"ublk: use READ_ONCE() to read struct ublksrv_ctrl_cmd","details":"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.","modified":"2026-07-08T08:13:32.222338818Z","published":"2026-05-27T12:18:33.939Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45975.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/ce63eda3e6d36e2c253febee1c8421ecbd1a680e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed9f54cc1e335096733aed03c2a46de3d58922ed"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45975.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45975"},{"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":"87213b0d847cd300285b5545598e0548baeb5208"},{"fixed":"ce63eda3e6d36e2c253febee1c8421ecbd1a680e"},{"fixed":"ed9f54cc1e335096733aed03c2a46de3d58922ed"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45975.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45975.json"}}],"schema_version":"1.7.5"}