CVE-2026-31464

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()<br /> <br /> A malicious or compromised VIO server can return a num_written value in the<br /> discover targets MAD response that exceeds max_targets. This value is<br /> stored directly in vhost-&gt;num_targets without validation, and is then used<br /> as the loop bound in ibmvfc_alloc_targets() to index into disc_buf[], which<br /> is only allocated for max_targets entries. Indices at or beyond max_targets<br /> access kernel memory outside the DMA-coherent allocation. The<br /> out-of-bounds data is subsequently embedded in Implicit Logout and PLOGI<br /> MADs that are sent back to the VIO server, leaking kernel memory.<br /> <br /> Fix by clamping num_written to max_targets before storing it.