CVE-2026-89859

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak

qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response

buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full

sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound

sg_copy_to_buffer() only fills as many bytes as the user request payload

provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The

options and unused[] fields are therefore copied out uninitialized,

leaking kernel heap contents to user space.

Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References