{
  "cveId": "CVE-2023-52484",
  "url": "https://patchblox.com/security/cve/CVE-2023-52484",
  "summary": "CVE-2023-52484 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52484, released February 29, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/arm-smmu-v3: Fix soft lockup triggered by...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range  When running an SVA case, the following soft lockup is triggered: -------------------------------------------------------------------- watchdog: BUG: soft lockup - CPU#244 stuck for 26s! pstate: 83400009 (Nzcv daif \u002BPAN -UAO \u002BTCO \u002BDIT -SSBS BTYPE=--) pc : arm_smmu_cmdq_issue_cmdlist\u002B0x178/0xa50 lr : arm_smmu_cmdq_issue_cmdlist\u002B0x150/0xa50 sp : ffff8000d83ef290 x29: ffff8000d83ef290 x28: 000000003b9aca00 x27: 0000000000000000 x26: ffff8000d83ef3c0 x25: da86c0812194a0e8 x24: 0000000000000000 x23: 0000000000000040 x22: ffff8000d83ef340 x21: ffff0000c63980c0 x20: 0000000000000001 x19: ffff0000c6398080 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: ffff3000b4a3bbb0 x14: ffff3000b4a30888 x13: ffff3000b4a3cf60 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : ffffc08120e4d6bc x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000048cfa x5 : 0000000000000000 x4 : 0000000000000001 x3 : 000000000000000a x2 : 0000000080000000 x1 : 0000000000000000 x0 : 0000000000000001 Call trace:  arm_smmu_cmdq_issue_cmdlist\u002B0x178/0xa50  __arm_smmu_tlb_inv_range\u002B0x118/0x254  arm_smmu_tlb_inv_range_asid\u002B0x6c/0x130  arm_smmu_mm_invalidate_range\u002B0xa0/0xa4  __mmu_notifier_invalidate_range_end\u002B0x88/0x120  unmap_vmas\u002B0x194/0x1e0  unmap_region\u002B0xb4/0x144  do_mas_align_munmap\u002B0x290/0x490  do_mas_munmap\u002B0xbc/0x124  __vm_munmap\u002B0xa8/0x19c  __arm64_sys_munmap\u002B0x28/0x50  invoke_syscall\u002B0x78/0x11c  el0_svc_common.constprop.0\u002B0x58/0x1c0  do_el0_svc\u002B0x34/0x60  el0_svc\u002B0x2c/0xd4  el0t_64_sync_handler\u002B0x114/0x140  el0t_64_sync\u002B0x1a4/0x1a8 --------------------------------------------------------------------  Note that since 6.6-rc1 the arm_smmu_mm_invalidate_range above is renamed to \u0022arm_smmu_mm_arch_invalidate_secondary_tlbs\u0022, yet the problem remains.  The commit 06ff87bae8d3 (\u0022arm64: mm: remove unused functions and variable protoypes\u0022) fixed a similar lockup on the CPU MMU side. Yet, it can occur to SMMU too, since arm_smmu_mm_arch_invalidate_secondary_tlbs() is called typically next to MMU tlb flush function, e.g. \ttlb_flush_mmu_tlbonly { \t\ttlb_flush { \t\t\t__flush_tlb_range { \t\t\t\t// check MAX_TLBI_OPS \t\t\t} \t\t} \t\tmmu_notifier_arch_invalidate_secondary_tlbs { \t\t\tarm_smmu_mm_arch_invalidate_secondary_tlbs { \t\t\t\t// does not check MAX_TLBI_OPS \t\t\t} \t\t} \t}  Clone a CMDQ_MAX_TLBI_OPS from the MAX_TLBI_OPS in tlbflush.h, since in an SVA case SMMU uses the CPU page table, so it makes sense to align with the tlbflush code. Then, replace per-page TLBI commands with a single per-asid TLBI command, if the request size hits this threshold.",
  "published": "2024-02-29T06:15:46Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00173,
  "epssPercentile": 0.06777,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.64-1",
      "fix": "DEBIAN-CVE-2023-52484",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52484",
      "released": "2024-02-29T06:15:46Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.5.6-1",
      "fix": "DEBIAN-CVE-2023-52484",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52484",
      "released": "2024-02-29T06:15:46Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.5.6-1",
      "fix": "DEBIAN-CVE-2023-52484",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52484",
      "released": "2024-02-29T06:15:46Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}