Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < 1ce8faf90eb0bf5599b90db38500aefea9426485; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < b873099944dae5702b4b6db6814d1f1e8d4cfb00; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < ff28a93a895912010a7827a0e1445ebe8be53b4d; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < cc29f7082b7ab5e0337f27d1fef16359f05fcffa; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < 1fb1236312ee1a600de6b3ca560f0b3fd5a50471; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < 0b4cf43f9ca7118590a338de900edbd6047cd89f; >= aaf2e048af2704da5869f27b508b288f36d5c7b7, < f594863967d87b7fcbff6e724d51135fd701a13d |
| Linux | Linux | 5.14 |
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
- https://git.kernel.org/stable/c/f594863967d87b7fcbff6e724d51135fd701a13d
- https://git.kernel.org/stable/c/ff28a93a895912010a7827a0e1445ebe8be53b4d
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received