CVE-2026-43471

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Fix possible NULL pointer dereference in ufshcd_add_command_trace() The kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL pointer dereference when accessing hwq->id. This can happen if ufshcd_mcq_req_to_hwq() returns NULL. This patch adds a NULL check for hwq before accessing its id field to prevent a kernel crash. Kernel log excerpt: [ ] notify_die+0x4c/0x8c [ ] __die+0x60/0xb0 [ ] die+0x4c/0xe0 [ ] die_kernel_fault+0x74/0x88 [ ] __do_kernel_fault+0x314/0x318 [ ] do_page_fault+0xa4/0x5f8 [ ] do_translation_fault+0x34/0x54 [ ] do_mem_abort+0x50/0xa8 [ ] el1_abort+0x3c/0x64 [ ] el1h_64_sync_handler+0x44/0xcc [ ] el1h_64_sync+0x80/0x88 [ ] ufshcd_add_command_trace+0x23c/0x320 [ ] ufshcd_compl_one_cqe+0xa4/0x404 [ ] ufshcd_mcq_poll_cqe_lock+0xac/0x104 [ ] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod] [ ] __handle_irq_event_percpu+0xc8/0x348 [ ] handle_irq_event+0x3c/0xa8 [ ] handle_fasteoi_irq+0xf8/0x294 [ ] generic_handle_domain_irq+0x54/0x80 [ ] gic_handle_irq+0x1d4/0x330 [ ] call_on_irq_stack+0x44/0x68 [ ] do_interrupt_handler+0x78/0xd8 [ ] el1_interrupt+0x48/0xa8 [ ] el1h_64_irq_handler+0x14/0x24 [ ] el1h_64_irq+0x80/0x88 [ ] arch_local_irq_enable+0x4/0x1c [ ] cpuidle_enter+0x34/0x54 [ ] do_idle+0x1dc/0x2f8 [ ] cpu_startup_entry+0x30/0x3c [ ] secondary_start_kernel+0x134/0x1ac [ ] __secondary_switched+0xc4/0xcc