{"id":"CVE-2026-90323","revision":"2f0cee20ff4e43b99b0e24384eda8781","records":[{"revision":"2f0cee20ff4e43b99b0e24384eda8781","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90323","aliases":[],"title":"ublk: validate auto buf reg before taking uring_cmd","description":"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->addr 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->buf is not written before __ublk_fetch()\nstate checks.","state":0,"publishedAt":"2026-09-17T16:08:39.434+00:00","modifiedAt":"2026-10-19T09:01:39.373+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/ublk_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"52460dda3a775a73f226312b43c0a0211e8665ea\",\n                            \"lessThan\": \"8397942b67128e0b1275cfedb5abf4faafac5fd0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"52460dda3a775a73f226312b43c0a0211e8665ea\",\n                            \"lessThan\": \"653d22269a8b83b491f7f186a5d7872f14e6ddca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"52460dda3a775a73f226312b43c0a0211e8665ea\",\n                            \"lessThan\": \"ca5a01eee34c7cbe0f531a613b0292a3ad1a419b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/block/ublk_drv.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/8397942b67128e0b1275cfedb5abf4faafac5fd0","https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca","https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90323","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90323","identifiers":["CVE-2026-90323"]},"retained":false,"historicalAffected":[]}],"coverage":[]}