{"cve":"CVE-2023-52808","nvd":{"published":"2024-05-21T16:15:19.113","modified":"2026-06-17T06:43:37.820","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs\n\nIf init debugfs failed during device registration due to memory allocation\nfailure, debugfs_remove_recursive() is called, after which debugfs_dir is\nnot set to NULL. debugfs_remove_recursive() will be called again during\ndevice removal. As a result, illegal pointer is accessed.\n\n[ 1665.467244] hisi_sas_v3_hw 0000:b4:02.0: failed to init debugfs!\n...\n[ 1669.836708] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0\n[ 1669.872669] pc : down_write+0x24/0x70\n[ 1669.876315] lr : down_write+0x1c/0x70\n[ 1669.879961] sp : ffff000036f53a30\n[ 1669.883260] x29: ffff000036f53a30 x28: ffffa027c31549f8\n[ 1669.888547] x27: ffffa027c3140000 x26: 0000000000000000\n[ 1669.893834] x25: ffffa027bf37c270 x24: ffffa027bf37c270\n[ 1669.899122] x23: ffff0000095406b8 x22: ffff0000095406a8\n[ 1669.904408] x21: 0000000000000000 x20: ffffa027bf37c310\n[ 1669.909695] x19: 00000000000000a0 x18: ffff8027dcd86f10\n[ 1669.914982] x17: 0000000000000000 x16: 0000000000000000\n[ 1669.920268] x15: 0000000000000000 x14: ffffa0274014f870\n[ 1669.925555] x13: 0000000000000040 x12: 0000000000000228\n[ 1669.930842] x11: 0000000000000020 x10: 0000000000000bb0\n[ 1669.936129] x9 : ffff000036f537f0 x8 : ffff80273088ca10\n[ 1669.941416] x7 : 000000000000001d x6 : 00000000ffffffff\n[ 1669.946702] x5 : ffff000008a36310 x4 : ffff80273088be00\n[ 1669.951989] x3 : ffff000009513e90 x2 : 0000000000000000\n[ 1669.957276] x1 : 00000000000000a0 x0 : ffffffff00000001\n[ 1669.962563] Call trace:\n[ 1669.965000]  down_write+0x24/0x70\n[ 1669.968301]  debugfs_remove_recursive+0x5c/0x1b0\n[ 1669.972905]  hisi_sas_debugfs_exit+0x24/0x30 [hisi_sas_main]\n[ 1669.978541]  hisi_sas_v3_remove+0x130/0x150 [hisi_sas_v3_hw]\n[ 1669.984175]  pci_device_remove+0x48/0xd8\n[ 1669.988082]  device_release_driver_internal+0x1b4/0x250\n[ 1669.993282]  device_release_driver+0x28/0x38\n[ 1669.997534]  pci_stop_bus_device+0x84/0xb8\n[ 1670.001611]  pci_stop_and_remove_bus_device_locked+0x24/0x40\n[ 1670.007244]  remove_store+0xfc/0x140\n[ 1670.010802]  dev_attr_store+0x44/0x60\n[ 1670.014448]  sysfs_kf_write+0x58/0x80\n[ 1670.018095]  kernfs_fop_write+0xe8/0x1f0\n[ 1670.022000]  __vfs_write+0x60/0x190\n[ 1670.025472]  vfs_write+0xac/0x1c0\n[ 1670.028771]  ksys_write+0x6c/0xd8\n[ 1670.032071]  __arm64_sys_write+0x24/0x30\n[ 1670.035977]  el0_svc_common+0x78/0x130\n[ 1670.039710]  el0_svc_handler+0x38/0x78\n[ 1670.043442]  el0_svc+0x8/0xc\n\nTo fix this, set debugfs_dir to NULL after debugfs_remove_recursive().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/33331b265aac9441ac0c1a5442e3f05d038240ec","https://git.kernel.org/stable/c/6de426f9276c448e2db7238911c97fb157cb23be","https://git.kernel.org/stable/c/75a2656260fe8c7eeabda6ff4600b29e183f48db","https://git.kernel.org/stable/c/b4465009e7d60c6111946db4c8f1e50d401ed7be","https://git.kernel.org/stable/c/f0bfc8a5561fb0b2c48183dcbfe00bdd6d973bd3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2023-52808","score":0.00239,"percentile":0.15001,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}