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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.13.7",
              "versionStartIncluding": "6.13",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm: pgtable: fix NULL pointer dereference issue\n\nWhen update_mmu_cache_range() is called by update_mmu_cache(), the vmf\nparameter is NULL, which will cause a NULL pointer dereference issue in\nadjust_pte():\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000030 when read\nHardware name: Atmel AT91SAM9\nPC is at update_mmu_cache_range+0x1e0/0x278\nLR is at pte_offset_map_rw_nolock+0x18/0x2c\nCall trace:\n update_mmu_cache_range from remove_migration_pte+0x29c/0x2ec\n remove_migration_pte from rmap_walk_file+0xcc/0x130\n rmap_walk_file from remove_migration_ptes+0x90/0xa4\n remove_migration_ptes from migrate_pages_batch+0x6d4/0x858\n migrate_pages_batch from migrate_pages+0x188/0x488\n migrate_pages from compact_zone+0x56c/0x954\n compact_zone from compact_node+0x90/0xf0\n compact_node from kcompactd+0x1d4/0x204\n kcompactd from kthread+0x120/0x12c\n kthread from ret_from_fork+0x14/0x38\nException stack(0xc0d8bfb0 to 0xc0d8bff8)\n\nTo fix it, do not rely on whether \u0027ptl\u0027 is equal to decide whether to hold\nthe pte lock, but decide it by whether CONFIG_SPLIT_PTE_PTLOCKS is\nenabled.  In addition, if two vmas map to the same PTE page, there is no\nneed to hold the pte lock again, otherwise a deadlock will occur.  Just\nadd the need_lock parameter to let adjust_pte() know this information."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm: pgtable: corregir problema de desreferencia de puntero NULL Cuando update_mmu_cache_range() es llamado por update_mmu_cache(), el par\u00e1metro vmf es NULL, lo que causar\u00e1 un problema de desreferencia de puntero NULL en adjust_pte(): No se puede gestionar la desreferencia de puntero NULL del kernel en la direcci\u00f3n virtual 00000030 cuando se lee Nombre del hardware: Atmel AT91SAM9 La PC est\u00e1 en update_mmu_cache_range+0x1e0/0x278 LR est\u00e1 en pte_offset_map_rw_nolock+0x18/0x2c Rastreo de llamadas: update_mmu_cache_range de remove_migration_pte+0x29c/0x2ec remove_migration_pte de rmap_walk_file+0xcc/0x130 rmap_walk_file de remove_migration_ptes+0x90/0xa4 remove_migration_ptes de migration_pages_batch+0x6d4/0x858 migration_pages_batch de migration_pages+0x188/0x488 migration_pages de compact_zone+0x56c/0x954 compact_zone de compact_node+0x90/0xf0 compact_node de kcompactd+0x1d4/0x204 kcompactd de kthread+0x120/0x12c kthread de ret_from_fork+0x14/0x38 Pila de excepciones (0xc0d8bfb0 a 0xc0d8bff8) Para solucionarlo, no conf\u00ede en si \u0027ptl\u0027 es igual para decidir si mantener el bloqueo pte, sino dec\u00eddalo en funci\u00f3n de si CONFIG_SPLIT_PTE_PTLOCKS est\u00e1 habilitado. Adem\u00e1s, si dos m\u00e1quinas virtuales asignan a la misma p\u00e1gina PTE, no es necesario volver a bloquear la p\u00e1gina PTE; de lo contrario, se producir\u00e1 un bloqueo. Simplemente agregue el par\u00e1metro need_lock para que adjust_pte() conozca esta informaci\u00f3n."
    }
  ],
  "id": "CVE-2025-21933",
  "lastModified": "2025-04-10T18:06:52.953",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-04-01T16:15:24.143",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/91d011efe30aedde067ce6d218d521cf99b162e5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a564ccfe300fa6a065beda06ab7f3c140d6b4d63"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}