{"id":"CVE-2026-74574","summary":"dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev_open()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev_open()\n\nThe failed_dev_add and failed_dev_name paths drop the file-device\nreference while wq-\u003ewq_lock is still held. If put_device(fdev) drops the\nlast reference, idxd_file_dev_release() runs synchronously and tries to\ntake wq-\u003ewq_lock again, deadlocking.\n\nThose paths also fall through into the later ctx cleanup labels even\nthough idxd_file_dev_release() owns that cleanup and frees ctx. This can\nmake idxd_xa_pasid_remove(ctx) and kfree(ctx) operate on a freed context.\n\nMove idxd_wq_get() before file-device setup can fail, since the release\ncallback always calls idxd_wq_put(). Then unlock wq-\u003ewq_lock before\nput_device(fdev) and return directly from the file-device setup failure\npath, leaving ctx cleanup to the release callback.","modified":"2026-08-18T03:56:52.340484326Z","published":"2026-08-15T12:28:12.558Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74574.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0679c0c189d2548f00e1bac95be28e2df5c6c7f7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e26a41c4c1a706edaaa7c7dffc6b3b945707a55"},{"type":"WEB","url":"https://git.kernel.org/stable/c/778ccbded2c8749c5be7f0dfa04fc9977a36fb7e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d5d28285728be47c82fdf1c48be4268293c90e7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee1d7274102285d78a53161fc705a8d8cd40b066"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74574.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74574"},{"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":"e6fd6d7e5f0fe4a17a08e892afb5db800e7794ec"},{"fixed":"778ccbded2c8749c5be7f0dfa04fc9977a36fb7e"},{"fixed":"8d5d28285728be47c82fdf1c48be4268293c90e7"},{"fixed":"0679c0c189d2548f00e1bac95be28e2df5c6c7f7"},{"fixed":"6e26a41c4c1a706edaaa7c7dffc6b3b945707a55"},{"fixed":"ee1d7274102285d78a53161fc705a8d8cd40b066"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74574.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74574.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}