{"id":"CVE-2026-90228","published":"2026-09-17T17:17:18.517","lastModified":"2026-09-18T18:17:47.650","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()\n\nWhen a host issues an Identify command with CNS 05h (I/O Command Set\nspecific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed\nnamespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on\nreq->ns->bdev. A file-backed namespace has no block device, so\nreq->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing.\n\nThe I/O command set is selected by the host-supplied CSI field and the\ncommand is routed here whenever CONFIG_BLK_DEV_ZONED is enabled,\nindependent of the namespace backing type, so any file-backed namespace\nis exposed.\n\nReject the command with Invalid Field when the namespace is not backed\nby a block device.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/0b4cf43f9ca7118590a338de900edbd6047cd89f","tags":[]},{"url":"https://git.kernel.org/stable/c/1ce8faf90eb0bf5599b90db38500aefea9426485","tags":[]},{"url":"https://git.kernel.org/stable/c/1fb1236312ee1a600de6b3ca560f0b3fd5a50471","tags":[]},{"url":"https://git.kernel.org/stable/c/b873099944dae5702b4b6db6814d1f1e8d4cfb00","tags":[]},{"url":"https://git.kernel.org/stable/c/cc29f7082b7ab5e0337f27d1fef16359f05fcffa","tags":[]},{"url":"https://git.kernel.org/stable/c/f594863967d87b7fcbff6e724d51135fd701a13d","tags":[]},{"url":"https://git.kernel.org/stable/c/ff28a93a895912010a7827a0e1445ebe8be53b4d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}