{"cve":"CVE-2026-90336","nvd":{"published":"2026-09-17T17:17:32.180","modified":"2026-10-21T13:20:51.253","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: clear freed pointers on uart_register_driver() failure\n\nuart_register_driver() leaves drv->state pointing to freed memory when\ntty_alloc_driver() fails. If tty_register_driver() fails, drv->tty_driver\nalso retains a pointer after its reference is dropped.\n\nDrivers that use drv->state as an \"already registered\" flag can then skip\nregistration on the next probe and pass the freed state to\nuart_add_one_port().\n\nThis issue was found with failslab on QEMU's raspi1ap board by\nfailing registration and binding the PL011 port again.\n\nClear both pointers on their failure paths, as uart_unregister_driver()\nalready does.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/06b376432974fe5f25f2843a8e8438c6a1cf3d50","https://git.kernel.org/stable/c/61a2fb25551be0375bc16ef2a70c987dfca26183","https://git.kernel.org/stable/c/802e2192a9d38027730c2869c67c9131b8c8fe9f","https://git.kernel.org/stable/c/a9c0ffe5930c97b352f32febfc59a6e6ae6772ee","https://git.kernel.org/stable/c/ddf51d74ee9f9857c99477329d80408cedebda61"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-90336","score":0.00209,"percentile":0.10926,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}