CVE-2026-89861

/// Technical description

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

scsi: qla2xxx: Hold vport reference in qla24xx_report_id_acquisition()

In the format 1 path, the virtual port is located on ha->vp_list while

holding vport_slock, but the lock is dropped before vp is used:

qla_update_host_map() is called and VP_IDX_ACQUIRED/REGISTER_FC4_NEEDED/

REGISTER_FDMI_NEEDED are set on vp. No reference is taken across that

window, so a concurrent qla24xx_deallocate_vp_id() can tear the vport

down and free it, leading to a use-after-free.

Take a vport reference (vref_count) under vport_slock when the matching

vp is found, and drop it after the last use of

vp. qla24xx_deallocate_vp_id() waits for vref_count to reach zero before

unlinking and freeing the vport, so the pointer stays valid. This

matches the reference idiom already used by the other ha->vp_list

traversals.

/// 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