nvd-json-data-feeds/CVE-2022/CVE-2022-487xx/CVE-2022-48726.json

{
  "id": "CVE-2022-48726",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-06-20T12:15:11.077",
  "lastModified": "2024-11-21T07:33:52.330",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ucma: Protect mc during concurrent multicast leaves\n\nPartially revert the commit mentioned in the Fixes line to make sure that\nallocation and erasing multicast struct are locked.\n\n  BUG: KASAN: use-after-free in ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]\n  BUG: KASAN: use-after-free in ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579\n  Read of size 8 at addr ffff88801bb74b00 by task syz-executor.1/25529\n  CPU: 0 PID: 25529 Comm: syz-executor.1 Not tainted 5.16.0-rc7-syzkaller #0\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\n  Call Trace:\n   __dump_stack lib/dump_stack.c:88 [inline]\n   dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n   print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan/report.c:247\n   __kasan_report mm/kasan/report.c:433 [inline]\n   kasan_report.cold+0x83/0xdf mm/kasan/report.c:450\n   ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [inline]\n   ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c:579\n   ucma_destroy_id+0x1e6/0x280 drivers/infiniband/core/ucma.c:614\n   ucma_write+0x25c/0x350 drivers/infiniband/core/ucma.c:1732\n   vfs_write+0x28e/0xae0 fs/read_write.c:588\n   ksys_write+0x1ee/0x250 fs/read_write.c:643\n   do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nCurrently the xarray search can touch a concurrently freeing mc as the\nxa_for_each() is not surrounded by any lock. Rather than hold the lock for\na full scan hold it only for the effected items, which is usually an empty\nlist."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/ucma: protege mc durante las salidas simult\u00e1neas de multidifusi\u00f3n. Revierta parcialmente la confirmaci\u00f3n mencionada en la l\u00ednea Correcciones para asegurarse de que la asignaci\u00f3n y el borrado de la estructura de multidifusi\u00f3n est\u00e9n bloqueados. ERROR: KASAN: use-after-free en ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [en l\u00ednea] ERROR: KASAN: use-after-free en ucma_destroy_private_ctx+0x914/0xb70 drivers/infiniband/core/ucma.c: 579 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88801bb74b00 mediante la tarea syz-executor.1/25529 CPU: 0 PID: 25529 Comm: syz-executor.1 No contaminado 5.16.0-rc7-syzkaller #0 Nombre de hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x320 mm/kasan /report.c:247 __kasan_report mm/kasan/report.c:433 [en l\u00ednea] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 ucma_cleanup_multicast drivers/infiniband/core/ucma.c:491 [en l\u00ednea] ucma_destroy_private_ctx+0x914/0xb70 controladores/infiniband/core/ucma.c:579 ucma_destroy_id+0x1e6/0x280 controladores/infiniband/core/ucma.c:614 ucma_write+0x25c/0x350 controladores/infiniband/core/ucma.c:1732 vfs_write+ 0x28e/0xae0 fs/read_write.c:588 ksys_write+0x1ee/0x250 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x35/0xb0 arch/x86/entry/common. c:80 Entry_SYSCALL_64_after_hwframe+0x44/0xae Actualmente, la b\u00fasqueda de xarray puede tocar un mc que se libera simult\u00e1neamente ya que xa_for_each() no est\u00e1 rodeado por ning\u00fan candado. En lugar de mantener el bloqueo durante un escaneo completo, mant\u00e9ngalo solo para los elementos afectados, que generalmente son una lista vac\u00eda."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
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