CVE-2026-43413

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: hisi_sas: Fix NULL pointer exception during user_scan()<br /> <br /> user_scan() invokes updated sas_user_scan() for channel 0, and if<br /> successful, iteratively scans remaining channels (1 to shost-&gt;max_channel)<br /> via scsi_scan_host_selected() in commit 37c4e72b0651 ("scsi: Fix<br /> sas_user_scan() to handle wildcard and multi-channel scans"). However,<br /> hisi_sas supports only one channel, and the current value of max_channel is<br /> 1. sas_user_scan() for channel 1 will trigger the following NULL pointer<br /> exception:<br /> <br /> [ 441.554662] Unable to handle kernel NULL pointer dereference at virtual address 00000000000008b0<br /> [ 441.554699] Mem abort info:<br /> [ 441.554710] ESR = 0x0000000096000004<br /> [ 441.554718] EC = 0x25: DABT (current EL), IL = 32 bits<br /> [ 441.554723] SET = 0, FnV = 0<br /> [ 441.554726] EA = 0, S1PTW = 0<br /> [ 441.554730] FSC = 0x04: level 0 translation fault<br /> [ 441.554735] Data abort info:<br /> [ 441.554737] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000<br /> [ 441.554742] CM = 0, WnR = 0, TnD = 0, TagAccess = 0<br /> [ 441.554747] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0<br /> [ 441.554752] user pgtable: 4k pages, 48-bit VAs, pgdp=00000828377a6000<br /> [ 441.554757] [00000000000008b0] pgd=0000000000000000, p4d=0000000000000000<br /> [ 441.554769] Internal error: Oops: 0000000096000004 [#1] SMP<br /> [ 441.629589] Modules linked in: arm_spe_pmu arm_smmuv3_pmu tpm_tis_spi hisi_uncore_sllc_pmu hisi_uncore_pa_pmu hisi_uncore_l3c_pmu hisi_uncore_hha_pmu hisi_uncore_ddrc_pmu hisi_uncore_cpa_pmu hns3_pmu hisi_ptt hisi_pcie_pmu tpm_tis_core spidev spi_hisi_sfc_v3xx hisi_uncore_pmu spi_dw_mmio fuse hclge hclge_common hisi_sec2 hisi_hpre hisi_zip hisi_qm hns3 hisi_sas_v3_hw sm3_ce sbsa_gwdt hnae3 hisi_sas_main uacce hisi_dma i2c_hisi dm_mirror dm_region_hash dm_log dm_mod<br /> [ 441.670819] CPU: 46 UID: 0 PID: 6994 Comm: bash Kdump: loaded Not tainted 7.0.0-rc2+ #84 PREEMPT<br /> [ 441.691327] pstate: 81400009 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)<br /> [ 441.698277] pc : sas_find_dev_by_rphy+0x44/0x118<br /> [ 441.702896] lr : sas_find_dev_by_rphy+0x3c/0x118<br /> [ 441.707502] sp : ffff80009abbba40<br /> [ 441.710805] x29: ffff80009abbba40 x28: ffff082819a40008 x27: ffff082810c37c08<br /> [ 441.717930] x26: ffff082810c37c28 x25: ffff082819a40290 x24: ffff082810c37c00<br /> [ 441.725054] x23: 0000000000000000 x22: 0000000000000001 x21: ffff082819a40000<br /> [ 441.732179] x20: ffff082819a40290 x19: 0000000000000000 x18: 0000000000000020<br /> [ 441.739304] x17: 0000000000000000 x16: ffffb5dad6bda690 x15: 00000000ffffffff<br /> [ 441.746428] x14: ffff082814c3b26c x13: 00000000ffffffff x12: ffff082814c3b26a<br /> [ 441.753553] x11: 00000000000000c0 x10: 000000000000003a x9 : ffffb5dad5ea94f4<br /> [ 441.760678] x8 : 000000000000003a x7 : ffff80009abbbab0 x6 : 0000000000000030<br /> [ 441.767802] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000<br /> [ 441.774926] x2 : ffff08280f35a300 x1 : ffffb5dad7127180 x0 : 0000000000000000<br /> [ 441.782053] Call trace:<br /> [ 441.784488] sas_find_dev_by_rphy+0x44/0x118 (P)<br /> [ 441.789095] sas_target_alloc+0x24/0xb0<br /> [ 441.792920] scsi_alloc_target+0x290/0x330<br /> [ 441.797010] __scsi_scan_target+0x88/0x258<br /> [ 441.801096] scsi_scan_channel+0x74/0xb8<br /> [ 441.805008] scsi_scan_host_selected+0x170/0x188<br /> [ 441.809615] sas_user_scan+0xfc/0x148<br /> [ 441.813267] store_scan+0x10c/0x180<br /> [ 441.816743] dev_attr_store+0x20/0x40<br /> [ 441.820398] sysfs_kf_write+0x84/0xa8<br /> [ 441.824054] kernfs_fop_write_iter+0x130/0x1c8<br /> [ 441.828487] vfs_write+0x2c0/0x370<br /> [ 441.831880] ksys_write+0x74/0x118<br /> [ 441.835271] __arm64_sys_write+0x24/0x38<br /> [ 441.839182] invoke_syscall+0x50/0x120<br /> [ 441.842919] el0_svc_common.constprop.0+0xc8/0xf0<br /> [ 441.847611] do_el0_svc+0x24/0x38<br /> [ 441.850913] el0_svc+0x38/0x158<br /> [ 441.854043] el0t_64_sync_handler+0xa0/0xe8<br /> [ 441.858214] el0t_64_sync+0x1ac/0x1b0<br /> [ 441.861865] Code: aa1303e0 97ff70a8 34ffff80 d10a4273 (f9445a75)<br /> [ 441.867946] ---[ end trace 0000000000000000 ]---<br /> <br /> Therefore<br /> ---truncated---