{"cve":"CVE-2023-52484","nvd":{"published":"2024-02-29T06:15:46.190","modified":"2026-06-17T06:42:49.923","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range\n\nWhen running an SVA case, the following soft lockup is triggered:\n--------------------------------------------------------------------\nwatchdog: BUG: soft lockup - CPU#244 stuck for 26s!\npstate: 83400009 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)\npc : arm_smmu_cmdq_issue_cmdlist+0x178/0xa50\nlr : arm_smmu_cmdq_issue_cmdlist+0x150/0xa50\nsp : ffff8000d83ef290\nx29: ffff8000d83ef290 x28: 000000003b9aca00 x27: 0000000000000000\nx26: ffff8000d83ef3c0 x25: da86c0812194a0e8 x24: 0000000000000000\nx23: 0000000000000040 x22: ffff8000d83ef340 x21: ffff0000c63980c0\nx20: 0000000000000001 x19: ffff0000c6398080 x18: 0000000000000000\nx17: 0000000000000000 x16: 0000000000000000 x15: ffff3000b4a3bbb0\nx14: ffff3000b4a30888 x13: ffff3000b4a3cf60 x12: 0000000000000000\nx11: 0000000000000000 x10: 0000000000000000 x9 : ffffc08120e4d6bc\nx8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000048cfa\nx5 : 0000000000000000 x4 : 0000000000000001 x3 : 000000000000000a\nx2 : 0000000080000000 x1 : 0000000000000000 x0 : 0000000000000001\nCall trace:\n arm_smmu_cmdq_issue_cmdlist+0x178/0xa50\n __arm_smmu_tlb_inv_range+0x118/0x254\n arm_smmu_tlb_inv_range_asid+0x6c/0x130\n arm_smmu_mm_invalidate_range+0xa0/0xa4\n __mmu_notifier_invalidate_range_end+0x88/0x120\n unmap_vmas+0x194/0x1e0\n unmap_region+0xb4/0x144\n do_mas_align_munmap+0x290/0x490\n do_mas_munmap+0xbc/0x124\n __vm_munmap+0xa8/0x19c\n __arm64_sys_munmap+0x28/0x50\n invoke_syscall+0x78/0x11c\n el0_svc_common.constprop.0+0x58/0x1c0\n do_el0_svc+0x34/0x60\n el0_svc+0x2c/0xd4\n el0t_64_sync_handler+0x114/0x140\n el0t_64_sync+0x1a4/0x1a8\n--------------------------------------------------------------------\n\nNote that since 6.6-rc1 the arm_smmu_mm_invalidate_range above is renamed\nto \"arm_smmu_mm_arch_invalidate_secondary_tlbs\", yet the problem remains.\n\nThe commit 06ff87bae8d3 (\"arm64: mm: remove unused functions and variable\nprotoypes\") fixed a similar lockup on the CPU MMU side. Yet, it can occur\nto SMMU too, since arm_smmu_mm_arch_invalidate_secondary_tlbs() is called\ntypically next to MMU tlb flush function, e.g.\n\ttlb_flush_mmu_tlbonly {\n\t\ttlb_flush {\n\t\t\t__flush_tlb_range {\n\t\t\t\t// check MAX_TLBI_OPS\n\t\t\t}\n\t\t}\n\t\tmmu_notifier_arch_invalidate_secondary_tlbs {\n\t\t\tarm_smmu_mm_arch_invalidate_secondary_tlbs {\n\t\t\t\t// does not check MAX_TLBI_OPS\n\t\t\t}\n\t\t}\n\t}\n\nClone a CMDQ_MAX_TLBI_OPS from the MAX_TLBI_OPS in tlbflush.h, since in an\nSVA case SMMU uses the CPU page table, so it makes sense to align with the\ntlbflush code. Then, replace per-page TLBI commands with a single per-asid\nTLBI command, if the request size hits this threshold.","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-667"],"references":["https://git.kernel.org/stable/c/3283a1bce9bbc978059f790b84f3c10c32492429","https://git.kernel.org/stable/c/d5afb4b47e13161b3f33904d45110f9e6463bad6","https://git.kernel.org/stable/c/f5a604757aa8e37ea9c7011dc9da54fa1b30f29b","https://git.kernel.org/stable/c/f90f4c562003ac3d3b135c5a40a5383313f27264","https://git.kernel.org/stable/c/3283a1bce9bbc978059f790b84f3c10c32492429"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2023-52484","score":0.00173,"percentile":0.06721,"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."]}