CVE-2025-71236

A flaw was found in the Linux kernel's qla2xxx driver. This vulnerability, a NULL pointer dereference, occurs during fabric asynchronous scan cleanup when the qla_fab_async_scan function attempts to free memory associated with a NULL pointer. A local user may be able to indirectly trigger this flaw through device discovery and I/O (Input/Output) workloads, leading to a kernel crash and a denial of service (DoS). There is also a conservative worst-case consideration for potential memory corruption.

A NULL pointer dereference can occur in the qla2xxx driver during fabric async scan cleanup because qla_fab_async_scan may reach the done_free_sp path with sp set to NULL and then dereference sp fields and call kref_put. This leads to a kernel crash and denial of service that can be triggered by error handling paths during fabric discovery and reset related workflows. For the CVSS the PR is L because a local user may be able to influence device discovery and IO workloads indirectly, but in many environments the trigger is more dependent on hardware and SAN events than on direct unprivileged actions. The issue is not inherently network reachable from a typical IP network perspective. Impact is denial of service via kernel crash. A conservative worst case also considers potential memory corruption impact because the failure occurs in kernel driver cleanup paths.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.