{"id":"CVE-2026-90323","summary":"ublk: validate auto buf reg before taking uring_cmd","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: validate auto buf reg before taking uring_cmd\n\nWith UBLK_F_AUTO_BUF_REG, invalid sqe-\u003eaddr can fail after\nublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is\ncompleted while the tag stays active, which can hang teardown.\n\nSplit validation from buffer apply so the check has no side effects,\nthen take the uring_cmd and store the already-validated buffer. Apply\nthe same order in FETCH so io-\u003ebuf is not written before __ublk_fetch()\nstate checks.","modified":"2026-09-19T03:47:28.854589446Z","published":"2026-09-17T16:08:39.434Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90323.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90323"},{"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":"52460dda3a775a73f226312b43c0a0211e8665ea"},{"fixed":"653d22269a8b83b491f7f186a5d7872f14e6ddca"},{"fixed":"ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90323.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.17.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90323.json"}}],"schema_version":"1.9.0"}