CVE-2025-38029

{
  "id": "CVE-2025-38029",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-06-18T10:15:34.970",
  "lastModified": "2026-10-30T13:17:59.697",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkasan: avoid sleepable page allocation from atomic context\n\napply_to_pte_range() enters the lazy MMU mode and then invokes\nkasan_populate_vmalloc_pte() callback on each page table walk iteration. \nHowever, the callback can go into sleep when trying to allocate a single\npage, e.g.  if an architecutre disables preemption on lazy MMU mode enter.\n\nOn s390 if make arch_enter_lazy_mmu_mode() -> preempt_enable() and\narch_leave_lazy_mmu_mode() -> preempt_disable(), such crash occurs:\n\n[    0.663336] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321\n[    0.663348] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2, name: kthreadd\n[    0.663358] preempt_count: 1, expected: 0\n[    0.663366] RCU nest depth: 0, expected: 0\n[    0.663375] no locks held by kthreadd/2.\n[    0.663383] Preemption disabled at:\n[    0.663386] [<0002f3284cbb4eda>] apply_to_pte_range+0xfa/0x4a0\n[    0.663405] CPU: 0 UID: 0 PID: 2 Comm: kthreadd Not tainted 6.15.0-rc5-gcc-kasan-00043-gd76bb1ebb558-dirty #162 PREEMPT\n[    0.663408] Hardware name: IBM 3931 A01 701 (KVM/Linux)\n[    0.663409] Call Trace:\n[    0.663410]  [<0002f3284c385f58>] dump_stack_lvl+0xe8/0x140\n[    0.663413]  [<0002f3284c507b9e>] __might_resched+0x66e/0x700\n[    0.663415]  [<0002f3284cc4f6c0>] __alloc_frozen_pages_noprof+0x370/0x4b0\n[    0.663419]  [<0002f3284ccc73c0>] alloc_pages_mpol+0x1a0/0x4a0\n[    0.663421]  [<0002f3284ccc8518>] alloc_frozen_pages_noprof+0x88/0xc0\n[    0.663424]  [<0002f3284ccc8572>] alloc_pages_noprof+0x22/0x120\n[    0.663427]  [<0002f3284cc341ac>] get_free_pages_noprof+0x2c/0xc0\n[    0.663429]  [<0002f3284cceba70>] kasan_populate_vmalloc_pte+0x50/0x120\n[    0.663433]  [<0002f3284cbb4ef8>] apply_to_pte_range+0x118/0x4a0\n[    0.663435]  [<0002f3284cbc7c14>] apply_to_pmd_range+0x194/0x3e0\n[    0.663437]  [<0002f3284cbc99be>] __apply_to_page_range+0x2fe/0x7a0\n[    0.663440]  [<0002f3284cbc9e88>] apply_to_page_range+0x28/0x40\n[    0.663442]  [<0002f3284ccebf12>] kasan_populate_vmalloc+0x82/0xa0\n[    0.663445]  [<0002f3284cc1578c>] alloc_vmap_area+0x34c/0xc10\n[    0.663448]  [<0002f3284cc1c2a6>] __get_vm_area_node+0x186/0x2a0\n[    0.663451]  [<0002f3284cc1e696>] __vmalloc_node_range_noprof+0x116/0x310\n[    0.663454]  [<0002f3284cc1d950>] __vmalloc_node_noprof+0xd0/0x110\n[    0.663457]  [<0002f3284c454b88>] alloc_thread_stack_node+0xf8/0x330\n[    0.663460]  [<0002f3284c458d56>] dup_task_struct+0x66/0x4d0\n[    0.663463]  [<0002f3284c45be90>] copy_process+0x280/0x4b90\n[    0.663465]  [<0002f3284c460940>] kernel_clone+0xd0/0x4b0\n[    0.663467]  [<0002f3284c46115e>] kernel_thread+0xbe/0xe0\n[    0.663469]  [<0002f3284c4e440e>] kthreadd+0x50e/0x7f0\n[    0.663472]  [<0002f3284c38c04a>] __ret_from_fork+0x8a/0xf0\n[    0.663475]  [<0002f3284ed57ff2>] ret_from_fork+0xa/0x38\n\nInstead of allocating single pages per-PTE, bulk-allocate the shadow\nmemory prior to applying kasan_populate_vmalloc_pte() callback on a page\nrange."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: kasan: evitar la asignación de páginas inactivas desde un contexto atómico. apply_to_pte_range() entra en el modo MMU perezoso e invoca la devolución de llamada kasan_populate_vmalloc_pte() en cada iteración del recorrido de la tabla de páginas. Sin embargo, la devolución de llamada puede entrar en modo inactivo al intentar asignar una sola página, por ejemplo, si una arquitectura deshabilita la preempción al entrar en el modo MMU perezoso. En s390, si se hace arch_enter_lazy_mmu_mode() -&gt; preempt_enable() y arch_leave_lazy_mmu_mode() -&gt; preempt_disable(), se produce el siguiente fallo: [0.663336] ERROR: función inactiva llamada desde un contexto no válido en ./include/linux/sched/mm.h:321 [0.663348] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2, name: kthreadd [0.663358] preempt_count: 1, esperado: 0 [0.663366] Profundidad de anidamiento de RCU: 0, esperado: 0 [0.663375] kthreadd/2 no mantiene bloqueos. [ 0.663383] Preempción deshabilitada en: [ 0.663386] [&lt;0002f3284cbb4eda&gt;] apply_to_pte_range+0xfa/0x4a0 [ 0.663405] CPU: 0 UID: 0 PID: 2 Comm: kthreadd No contaminado 6.15.0-rc5-gcc-kasan-00043-gd76bb1ebb558-dirty #162 PREEMPT [ 0.663408] Nombre del hardware: IBM 3931 A01 701 (KVM/Linux) [ 0.663409] Rastreo de llamadas: [ 0.663410] [&lt;0002f3284c385f58&gt;] dump_stack_lvl+0xe8/0x140 [ 0.663413] [&lt;0002f3284c507b9e&gt;] __might_resched+0x66e/0x700 [ 0.663415] [&lt;0002f3284cc4f6c0&gt;] __alloc_frozen_pages_noprof+0x370/0x4b0 [ 0.663419] [&lt;0002f3284ccc73c0&gt;] alloc_pages_mpol+0x1a0/0x4a0 [ 0.663421] [&lt;0002f3284ccc8518&gt;] alloc_frozen_pages_noprof+0x88/0xc0 [ 0.663424] [&lt;0002f3284ccc8572&gt;] alloc_pages_noprof+0x22/0x120 [ 0.663427] [&lt;0002f3284cc341ac&gt;] get_free_pages_noprof+0x2c/0xc0 [ 0.663429] [&lt;0002f3284cceba70&gt;] kasan_populate_vmalloc_pte+0x50/0x120 [ 0.663433] [&lt;0002f3284cbb4ef8&gt;] apply_to_pte_range+0x118/0x4a0 [ 0.663435] [&lt;0002f3284cbc7c14&gt;] apply_to_pmd_range+0x194/0x3e0 [ 0.663437] [&lt;0002f3284cbc99be&gt;] __apply_to_page_range+0x2fe/0x7a0 [ 0.663440] [&lt;0002f3284cbc9e88&gt;] apply_to_page_range+0x28/0x40 [ 0.663442] [&lt;0002f3284ccebf12&gt;] kasan_populate_vmalloc+0x82/0xa0 [ 0.663445] [&lt;0002f3284cc1578c&gt;] alloc_vmap_area+0x34c/0xc10 [ 0.663448] [&lt;0002f3284cc1c2a6&gt;] __get_vm_area_node+0x186/0x2a0 [ 0.663451] [&lt;0002f3284cc1e696&gt;] __vmalloc_node_range_noprof+0x116/0x310 [ 0.663454] [&lt;0002f3284cc1d950&gt;] __vmalloc_node_noprof+0xd0/0x110 [ 0.663457] [&lt;0002f3284c454b88&gt;] alloc_thread_stack_node+0xf8/0x330 [ 0.663460] [&lt;0002f3284c458d56&gt;] dup_task_struct+0x66/0x4d0 [ 0.663463] [&lt;0002f3284c45be90&gt;] copy_process+0x280/0x4b90 [ 0.663465] [&lt;0002f3284c460940&gt;] kernel_clone+0xd0/0x4b0 [ 0.663467] [&lt;0002f3284c46115e&gt;] kernel_thread+0xbe/0xe0 [ 0.663469] [&lt;0002f3284c4e440e&gt;] kthreadd+0x50e/0x7f0 [ 0.663472] [&lt;0002f3284c38c04a&gt;] __ret_from_fork+0x8a/0xf0 [ 0.663475] [&lt;0002f3284ed57ff2&gt;] ret_from_fork+0xa/0x38 En su lugar de asignar páginas individuales por PTE, asigne en masa la memoria de sombra antes de aplicar la devolución de llamada kasan_populate_vmalloc_pte() en un rango de páginas."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "mm/kasan/shadow.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862",
              "lessThan": "d6a895d88fbd453dc8f1c5e038188b49b272afe6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862",
              "lessThan": "c33a7fe6dda591694cebfe15abf4644abb4f61c0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862",
              "lessThan": "468e7d51dba433a72dcd63eee6db9ad721d39ac5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862",
              "lessThan": "6748dd09196248b985cca39eaf651d5317271977",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862",
              "lessThan": "b6ea95a34cbd014ab6ade4248107b86b0aaf2d6c",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "mm/kasan/shadow.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.5",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.14.9",
              "lessThanOrEqual": "6.14.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.15",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "5.5",
              "versionEndExcluding": "6.14.9",
              "matchCriteriaId": "8A3E4CE0-0A11-4A10-8C11-F07FD5804E1D"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "8C7B5B0E-4EEB-48F5-B4CF-0935A7633845"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "2D240580-3048-49B2-9E27-F115A9DF8224"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "90320558-E553-4EF5-8A0B-0F5D20113BD2"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "C300BA32-5854-4B59-A00A-18A402F291D0"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/468e7d51dba433a72dcd63eee6db9ad721d39ac5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6748dd09196248b985cca39eaf651d5317271977",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/b6ea95a34cbd014ab6ade4248107b86b0aaf2d6c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/c33a7fe6dda591694cebfe15abf4644abb4f61c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d6a895d88fbd453dc8f1c5e038188b49b272afe6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}