{"id":"CVE-2026-74574","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-74574","generatedAt":"2026-10-28T03:30:51.551Z","title":"In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev_open() The failed_dev_add and failed_dev_name paths drop the file-device reference while wq->wq_lock is still held.","description":"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->wq_lock is still held. If put_device(fdev) drops the\nlast reference, idxd_file_dev_release() runs synchronously and tries to\ntake wq->wq_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->wq_lock before\nput_device(fdev) and return directly from the file-device setup failure\npath, leaving ctx cleanup to the release callback.","published":"2026-08-15T13:18:03.000Z","lastModified":"2026-10-16T20:17:39.000Z","status":"Received","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00122,"percentile":0.01985,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0679c0c189d2548f00e1bac95be28e2df5c6c7f7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6e26a41c4c1a706edaaa7c7dffc6b3b945707a55","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/778ccbded2c8749c5be7f0dfa04fc9977a36fb7e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8d5d28285728be47c82fdf1c48be4268293c90e7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ee1d7274102285d78a53161fc705a8d8cd40b066","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74574","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}