CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's SCSI subsystem, specifically in the qla2xxx driver, where a use-after-free condition can occur due to improper handling of virtual port references. This flaw allows for potential exploitation, leading to system instability or unauthorized access if a virtual port is deallocated while still in use. Organizations utilizing affected Linux systems, particularly those relying on SCSI devices managed by the qla2xxx driver, should prioritize applying patches to mitigate this risk.
Original NVD 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.