{
  "id": "CVE-2022-48635",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-04-28T13:15:06.663",
  "lastModified": "2024-11-21T07:33:39.583",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfsdax: Fix infinite loop in dax_iomap_rw()\n\nI got an infinite loop and a WARNING report when executing a tail command\nin virtiofs.\n\n  WARNING: CPU: 10 PID: 964 at fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0\n  Modules linked in:\n  CPU: 10 PID: 964 Comm: tail Not tainted 5.19.0-rc7\n  Call Trace:\n  <TASK>\n  dax_iomap_rw+0xea/0x620\n  ? __this_cpu_preempt_check+0x13/0x20\n  fuse_dax_read_iter+0x47/0x80\n  fuse_file_read_iter+0xae/0xd0\n  new_sync_read+0xfe/0x180\n  ? 0xffffffff81000000\n  vfs_read+0x14d/0x1a0\n  ksys_read+0x6d/0xf0\n  __x64_sys_read+0x1a/0x20\n  do_syscall_64+0x3b/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe tail command will call read() with a count of 0. In this case,\niomap_iter() will report this WARNING, and always return 1 which casuing\nthe infinite loop in dax_iomap_rw().\n\nFixing by checking count whether is 0 in dax_iomap_rw()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: fsdax: Reparar bucle infinito en dax_iomap_rw() Obtuve un bucle infinito y un informe de ADVERTENCIA al ejecutar un comando tail en virtiofs. ADVERTENCIA: CPU: 10 PID: 964 en fs/iomap/iter.c:34 iomap_iter+0x3a2/0x3d0 M\u00f3dulos vinculados en: CPU: 10 PID: 964 Comm: tail No contaminado 5.19.0-rc7 Seguimiento de llamadas:  dax_iomap_rw +0xea/0x620 ? __this_cpu_preempt_check+0x13/0x20 fuse_dax_read_iter+0x47/0x80 fuse_file_read_iter+0xae/0xd0 new_sync_read+0xfe/0x180 ? 0xffffffff81000000 vfs_read+0x14d/0x1a0 ksys_read+0x6d/0xf0 __x64_sys_read+0x1a/0x20 do_syscall_64+0x3b/0x90 Entry_SYSCALL_64_after_hwframe+0x63/0xcd El comando tail llamar\u00e1 a read() con un recuento de 0. En este caso, iomap_iter() informar\u00e1 esto ADVERTENCIA, y siempre devuelve 1, lo que provoca el bucle infinito en dax_iomap_rw(). Arreglando verificando el recuento si es 0 en dax_iomap_rw()."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.2,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/60644dffac87b1bb47bdb393aa29d5f2ffcf41a0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/929ef155e1da41c06f4d8ca86ae12b851a83a744",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/60644dffac87b1bb47bdb393aa29d5f2ffcf41a0",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/929ef155e1da41c06f4d8ca86ae12b851a83a744",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}