CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's Fibre Channel transport, specifically the handling of FPIN ELS frames, which can be exploited by an adjacent actor in the Fibre Channel fabric, such as a compromised switch or fabric controller. This flaw allows an attacker to trigger a non-return condition in the transport layer, potentially leading to denial of service or other disruptions. Organizations utilizing Linux systems with Fibre Channel connectivity should prioritize patching this vulnerability to mitigate the risk of exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32 An adjacent Fibre Channel fabric actor that can deliver an FPIN ELS frame to an lpfc or qla2xxx Linux initiator can trigger a non-return in the generic FC transport. This is not a local userspace or IP network path; the attacker must be able to inject fabric traffic, for example as a compromised switch or fabric controller, or as a same-zone N_Port on a fabric that permits source spoofing. The Link-Integrity and Peer-Congestion FPIN walkers used a u8 loop counter against the 32-bit on-wire pname_count field, and did not bound pname_count by the descriptor body already validated by the TLV walker. A pname_count of 256 therefore wraps the counter and keeps the loop condition true indefinitely. Factor the shared pname_list[] walk into one helper, widen the counter to u32, and clamp pname_count against the entries that fit in the descriptor body before iterating.