CVE-2026-90228
In the Linux kernel, the following vulnerability has been resolved: nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns() When a host issues an Identify command with CNS 05h (I/O Command Set specific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed namespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on req->ns->bdev. A file-backed namespace has no block device, so req->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing. The I/O command set is selected by the host-supplied CSI field and the command is routed here whenever CONFIG_BLK_DEV_ZONED is enabled, independent of the namespace backing type, so any file-backed namespace is exposed. Reject the command with Invalid Field when the namespace is not backed by a block device.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-25)
- Published
- Modified
- Record from
- the NVD, synced
References
- https://git.kernel.org/stable/c/0b4cf43f9ca7118590a338de900edbd6047cd89f
- https://git.kernel.org/stable/c/1ce8faf90eb0bf5599b90db38500aefea9426485
- https://git.kernel.org/stable/c/1fb1236312ee1a600de6b3ca560f0b3fd5a50471
- https://git.kernel.org/stable/c/b873099944dae5702b4b6db6814d1f1e8d4cfb00
- https://git.kernel.org/stable/c/cc29f7082b7ab5e0337f27d1fef16359f05fcffa