{"id":"CVE-2023-53627","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list\n\nWhen freeing slots in function slot_complete_v3_hw(), it is possible that\nsas_dev.list is…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list\n\nWhen freeing slots in function slot_complete_v3_hw(), it is possible that\nsas_dev.list is…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.5, < 6.3.4"],"patched":["linux_kernel 6.3.4"],"published":"2025-10-07","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:28.430","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-53627","references":[{"url":"https://git.kernel.org/stable/c/6e2a40b3a332ea84079983be21c944de8ddbc4f3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6fb177f10d87b8d816402c488e83506d0fb5340a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/71fb36b5ff113a7674710b9d6063241eada84ff7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00184,"epssPercentile":0.07246,"ingestedAt":"2026-10-03T11:43:42.109Z","slug":"CVE-2023-53627","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list\n\nWhen freeing slots in function slot_complete_v3_hw(), it is possible that\nsas_dev.list is being traversed elsewhere, and it may trigger a NULL\npointer exception, such as follows:\n\n==>cq thread                    ==>scsi_eh_6\n\n                                ==>scsi_error_handler()\n\t\t\t\t  ==>sas_eh_handle_sas_errors()\n\t\t\t\t    ==>sas_scsi_find_task()\n\t\t\t\t      ==>lldd_abort_task()\n==>slot_complete_v3_hw()              ==>hisi_sas_abort_task()\n  ==>hisi_sas_slot_task_free()\t        ==>dereg_device_v3_hw()\n    ==>list_del_init()        \t\t  ==>list_for_each_entry_safe()\n\n[ 7165.434918] sas: Enter sas_scsi_recover_host busy: 32 failed: 32\n[ 7165.434926] sas: trying to find task 0x00000000769b5ba5\n[ 7165.434927] sas: sas_scsi_find_task: aborting task 0x00000000769b5ba5\n[ 7165.434940] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(00000000769b5ba5) aborted\n[ 7165.434964] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(00000000c9f7aa07) ignored\n[ 7165.434965] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(00000000e2a1cf01) ignored\n[ 7165.434968] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[ 7165.434972] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(0000000022d52d93) ignored\n[ 7165.434975] hisi_sas_v3_hw 0000:b4:02.0: slot complete: task(0000000066a7516c) ignored\n[ 7165.434976] Mem abort info:\n[ 7165.434982]   ESR = 0x96000004\n[ 7165.434991]   Exception class = DABT (current EL), IL = 32 bits\n[ 7165.434992]   SET = 0, FnV = 0\n[ 7165.434993]   EA = 0, S1PTW = 0\n[ 7165.434994] Data abort info:\n[ 7165.434994]   ISV = 0, ISS = 0x00000004\n[ 7165.434995]   CM = 0, WnR = 0\n[ 7165.434997] user pgtable: 4k pages, 48-bit VAs, pgdp = 00000000f29543f2\n[ 7165.434998] [0000000000000000] pgd=0000000000000000\n[ 7165.435003] Internal error: Oops: 96000004 [#1] SMP\n[ 7165.439863] Process scsi_eh_6 (pid: 4109, stack limit = 0x00000000c43818d5)\n[ 7165.468862] pstate: 00c00009 (nzcv daif +PAN +UAO)\n[ 7165.473637] pc : dereg_device_v3_hw+0x68/0xa8 [hisi_sas_v3_hw]\n[ 7165.479443] lr : dereg_device_v3_hw+0x2c/0xa8 [hisi_sas_v3_hw]\n[ 7165.485247] sp : ffff00001d623bc0\n[ 7165.488546] x29: ffff00001d623bc0 x28: ffffa027d03b9508\n[ 7165.493835] x27: ffff80278ed50af0 x26: ffffa027dd31e0a8\n[ 7165.499123] x25: ffffa027d9b27f88 x24: ffffa027d9b209f8\n[ 7165.504411] x23: ffffa027c45b0d60 x22: ffff80278ec07c00\n[ 7165.509700] x21: 0000000000000008 x20: ffffa027d9b209f8\n[ 7165.514988] x19: ffffa027d9b27f88 x18: ffffffffffffffff\n[ 7165.520276] x17: 0000000000000000 x16: 0000000000000000\n[ 7165.525564] x15: ffff0000091d9708 x14: ffff0000093b7dc8\n[ 7165.530852] x13: ffff0000093b7a23 x12: 6e7265746e692067\n[ 7165.536140] x11: 0000000000000000 x10: 0000000000000bb0\n[ 7165.541429] x9 : ffff00001d6238f0 x8 : ffffa027d877af00\n[ 7165.546718] x7 : ffffa027d6329600 x6 : ffff7e809f58ca00\n[ 7165.552006] x5 : 0000000000001f8a x4 : 000000000000088e\n[ 7165.557295] x3 : ffffa027d9b27fa8 x2 : 0000000000000000\n[ 7165.562583] x1 : 0000000000000000 x0 : 000000003000188e\n[ 7165.567872] Call trace:\n[ 7165.570309]  dereg_device_v3_hw+0x68/0xa8 [hisi_sas_v3_hw]\n[ 7165.575775]  hisi_sas_abort_task+0x248/0x358 [hisi_sas_main]\n[ 7165.581415]  sas_eh_handle_sas_errors+0x258/0x8e0 [libsas]\n[ 7165.586876]  sas_scsi_recover_host+0x134/0x458 [libsas]\n[ 7165.592082]  scsi_error_handler+0xb4/0x488\n[ 7165.596163]  kthread+0x134/0x138\n[ 7165.599380]  ret_from_fork+0x10/0x18\n[ 7165.602940] Code: d5033e9f b9000040 aa0103e2 eb03003f (f9400021)\n[ 7165.609004] kernel fault(0x1) notification starting on CPU 75\n[ 7165.700728] ---[ end trace fc042cbbea224efc ]---\n[ 7165.705326] Kernel panic - not syncing: Fatal exception\n\nTo fix the issue, grab sas_dev lock when traversing the members of\nsas_dev.list in dereg_device_v3_hw() and hisi_sas_release_tasks() to avoid\nconcurrency of adding and deleting member. When \n---truncated---\n\n## Affected\n\n- `linux_kernel >= 4.5, < 6.3.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.3.4`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}