CVE-2026-90228

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A NULL pointer dereference occurs in the nvmet execute identify ns zns() function. This happens when a host sends an Identify command with CNS 05h and CSI 02h (ZNS) targeting a file-backed namespace. Because file-backed namespaces lack a block device, the req->ns->bdev variable is NULL. When the system calls bdev is zoned() using this NULL variable, it causes a system crash (oops). This issue is triggered whenever CONFIG BLK DEV ZONED is enabled, regardless of the namespace backing type.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.