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CVE-2026-23244

Estado: AnalizadaAlta (7.1)—

In the Linux kernel, the following vulnerability has been resolved:

nvme: fix memory allocation in nvme_pr_read_keys()

nvme_pr_read_keys() takes num_keys from userspace and uses it to calculate the allocation size for rse via struct_size(). The upper limit is PR_KEYS_MAX (64K).

A malicious or buggy userspace can pass a large num_keys value that results in a 4MB allocation attempt at most, causing a warning in the page allocator when the order exceeds MAX_PAGE_ORDER.

To fix this, use kvzalloc() instead of kzalloc().

This bug has the same reasoning and fix with the patch below: https://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/

Detalles técnicos trazas, registros y código del informe original
Warning log:
WARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272
Modules linked in:
CPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
RIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216
Code: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d
RSP: 0018:ffffc90000fcf450 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0
RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0
RBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001
R10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000
R13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620
FS:  0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486
 alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557
 ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598
 __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629
 __do_kmalloc_node mm/slub.c:5645 [inline]
 __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669
 kmalloc_noprof include/linux/slab.h:961 [inline]
 kzalloc_noprof include/linux/slab.h:1094 [inline]
 nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245
 blkdev_pr_read_keys block/ioctl.c:456 [inline]
 blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730
 blkdev_ioctl+0x299/0x700 block/ioctl.c:786
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583
 x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fb893d3108d
Code: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d
RDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001
 </TASK>

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Tecnologías afectadas (1)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-23244",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5fd96a4e15de8442915a912233d800c56f49001d",
              "lessThan": "e42ff5abbd14927553b624c0e06d24df76156fe6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5fd96a4e15de8442915a912233d800c56f49001d",
              "lessThan": "15fb6d627484ee39ed73e202ef4720e1fa5c898e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5fd96a4e15de8442915a912233d800c56f49001d",
              "lessThan": "5a501379a010690ae9ae88bef62a1bae1aca32e6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5fd96a4e15de8442915a912233d800c56f49001d",
              "lessThan": "baef52d80093bd686e70b3cb7e0512a40ae76705",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5fd96a4e15de8442915a912233d800c56f49001d",
              "lessThan": "c3320153769f05fd7fe9d840cb555dd3080ae424",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/nvme/host/pr.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/nvme/host/pr.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-03-18T11:16:16.270",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/15fb6d627484ee39ed73e202ef4720e1fa5c898e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a501379a010690ae9ae88bef62a1bae1aca32e6",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/baef52d80093bd686e70b3cb7e0512a40ae76705",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c3320153769f05fd7fe9d840cb555dd3080ae424",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e42ff5abbd14927553b624c0e06d24df76156fe6",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix memory allocation in nvme_pr_read_keys()\n\nnvme_pr_read_keys() takes num_keys from userspace and uses it to\ncalculate the allocation size for rse via struct_size(). The upper\nlimit is PR_KEYS_MAX (64K).\n\nA malicious or buggy userspace can pass a large num_keys value that\nresults in a 4MB allocation attempt at most, causing a warning in\nthe page allocator when the order exceeds MAX_PAGE_ORDER.\n\nTo fix this, use kvzalloc() instead of kzalloc().\n\nThis bug has the same reasoning and fix with the patch below:\nhttps://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/\n\nWarning log:\nWARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272\nModules linked in:\nCPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216\nCode: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d\nRSP: 0018:ffffc90000fcf450 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0\nRDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0\nRBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001\nR10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000\nR13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620\nFS:  0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0\nCall Trace:\n <TASK>\n alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\n alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557\n ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598\n __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\n blkdev_pr_read_keys block/ioctl.c:456 [inline]\n blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\n blkdev_ioctl+0x299/0x700 block/ioctl.c:786\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583\n x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fb893d3108d\nCode: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d\nRDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003\nRBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001\n </TASK>"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnvme: corregir la asignación de memoria en nvme_pr_read_keys()\n\nnvme_pr_read_keys() toma num_keys del espacio de usuario y lo usa para calcular el tamaño de asignación para rse a través de struct_size(). El límite superior es PR_KEYS_MAX (64K).\n\nUn espacio de usuario malicioso o con errores puede pasar un valor grande de num_keys que resulta en un intento de asignación de 4MB como máximo, causando una advertencia en el asignador de páginas cuando el orden excede MAX_PAGE_ORDER.\n\nPara corregir esto, use kvzalloc() en lugar de kzalloc().\n\nEste error tiene el mismo razonamiento y corrección con el parche a continuación:\nhttps://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/\n\nRegistro de advertencia:\nADVERTENCIA: mm/page_alloc.c:5216 en __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272\nMódulos enlazados:\nCPU: 1 UID: 0 PID: 272 Comm: syz-executor117 No contaminado 6.19.0 #1 PREEMPT(voluntario)\nNombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216\nCódigo: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 &lt;0f&gt; 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d\nRSP: 0018:ffffc90000fcf450 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0\nRDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0\nRBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001\nR10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000\nR13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620\nFS: 0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0\nRastro de llamadas:\n \n alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\n alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557\n ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598\n __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\n blkdev_pr_read_keys block/ioctl.c:456 [inline]\n blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\n blkdev_ioctl+0x299/0x700 block/ioctl.c:786\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583\n x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fb893d3108d\nCódigo: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 &lt;48&gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d\nRDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003\nRBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001\n "
    }
  ],
  "lastModified": "2026-06-17T10:21:10.530",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "32772849-BF02-4208-99C1-068667D43F23",
              "versionEndExcluding": "6.6.130",
              "versionStartIncluding": "6.5.1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5",
              "versionEndExcluding": "6.12.77",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA",
              "versionEndExcluding": "6.18.17",
              "versionStartIncluding": "6.13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3",
              "versionEndExcluding": "6.19.7",
              "versionStartIncluding": "6.19"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A2D9420A-9BF4-4C16-B6DA-8A1D279F7384"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}