« Volver al listado

CVE-2024-26654

Estado: ModificadaAlta (7)—

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: sh: aica: reordenar operaciones de limpieza para evitar errores UAF. El dreamcastcard->timer podría programar el spu_dma_work y el spu_dma_work también podría armar el dreamcastcard->timer. Cuando se cierre snd_pcm_substream, se desasignará aica_channel. Pero aún se podría eliminar la referencia en el hilo del trabajador.

Leer descripción completaMostrar menos

La razón es que del_timer() regresará directamente independientemente de si el controlador del temporizador se está ejecutando o no y el trabajador podría reprogramarse en el controlador del temporizador. Como resultado, se producirá el error UAF. La situación picante se muestra a continuación: (Thread 1) | (Thread 2) snd_aicapcm_pcm_close() | ... | run_spu_dma() //worker | mod_timer() flush_work() | del_timer() | aica_period_elapsed() //timer kfree(dreamcastcard->channel) | schedule_work() | run_spu_dma() //worker ... | dreamcastcard->channel-> //USE Para mitigar este error y otros posibles casos extremos, llame a mod_timer() condicionalmente en run_spu_dma(), luego implemente la operación PCM sync_stop para cancelar tanto el temporizador como el trabajador. La operación sync_stop se llamará desde el núcleo PCM de forma adecuada cuando sea necesario.

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).

Tecnologías afectadas (2)

Debian — Debian LinuxLinux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2024-26654",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-26654",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-10T15:53:59.432754Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "4206ad65a0ee76920041a755bd3c17c6ba59bba2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "aa39e6878f61f50892ee2dd9d2176f72020be845",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "8c990221681688da34295d6d76cc2f5b963e83f5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "9d66ae0e7bb78b54e1e0525456c6b54e1d132046",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "61d4787692c1fccdc268ffa7a891f9c149f50901",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "3c907bf56905de7d27b329afaf59c2fb35d17b04",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "lessThan": "051e0840ffa8ab25554d6b14b62c9ab9e4901457",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "sound/sh/aica.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.23",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "4.19.312",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "status": "unaffected",
              "version": "5.4.274",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.215",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.154",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.84",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.24",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.7.12",
              "versionType": "semver",
              "lessThanOrEqual": "6.7.*"
            },
            {
              "status": "unaffected",
              "version": "6.8.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.8.*"
            },
            {
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "sound/sh/aica.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2024-04-01T09:15:51.063",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/051e0840ffa8ab25554d6b14b62c9ab9e4901457",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/3c907bf56905de7d27b329afaf59c2fb35d17b04",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/4206ad65a0ee76920041a755bd3c17c6ba59bba2",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/61d4787692c1fccdc268ffa7a891f9c149f50901",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/8c990221681688da34295d6d76cc2f5b963e83f5",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/9d66ae0e7bb78b54e1e0525456c6b54e1d132046",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa39e6878f61f50892ee2dd9d2176f72020be845",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.kernel.org/stable/c/eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
      "tags": [
        "Mailing List"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: sh: aica: reorder cleanup operations to avoid UAF bugs\n\nThe dreamcastcard->timer could schedule the spu_dma_work and the\nspu_dma_work could also arm the dreamcastcard->timer.\n\nWhen the snd_pcm_substream is closing, the aica_channel will be\ndeallocated. But it could still be dereferenced in the worker\nthread. The reason is that del_timer() will return directly\nregardless of whether the timer handler is running or not and\nthe worker could be rescheduled in the timer handler. As a result,\nthe UAF bug will happen. The racy situation is shown below:\n\n      (Thread 1)                 |      (Thread 2)\nsnd_aicapcm_pcm_close()          |\n ...                             |  run_spu_dma() //worker\n                                 |    mod_timer()\n  flush_work()                   |\n  del_timer()                    |  aica_period_elapsed() //timer\n  kfree(dreamcastcard->channel)  |    schedule_work()\n                                 |  run_spu_dma() //worker\n  ...                            |    dreamcastcard->channel-> //USE\n\nIn order to mitigate this bug and other possible corner cases,\ncall mod_timer() conditionally in run_spu_dma(), then implement\nPCM sync_stop op to cancel both the timer and worker. The sync_stop\nop will be called from PCM core appropriately when needed."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: sh: aica: reordenar operaciones de limpieza para evitar errores UAF. El dreamcastcard->timer podría programar el spu_dma_work y el spu_dma_work también podría armar el dreamcastcard->timer. Cuando se cierre snd_pcm_substream, se desasignará aica_channel. Pero aún se podría eliminar la referencia en el hilo del trabajador. La razón es que del_timer() regresará directamente independientemente de si el controlador del temporizador se está ejecutando o no y el trabajador podría reprogramarse en el controlador del temporizador. Como resultado, se producirá el error UAF. La situación picante se muestra a continuación: (Thread 1) | (Thread 2) snd_aicapcm_pcm_close() | ... | run_spu_dma() //worker | mod_timer() flush_work() | del_timer() | aica_period_elapsed() //timer kfree(dreamcastcard->channel) | schedule_work() | run_spu_dma() //worker ... | dreamcastcard->channel-> //USE Para mitigar este error y otros posibles casos extremos, llame a mod_timer() condicionalmente en run_spu_dma(), luego implemente la operación PCM sync_stop para cancelar tanto el temporizador como el trabajador. La operación sync_stop se llamará desde el núcleo PCM de forma adecuada cuando sea necesario."
    }
  ],
  "lastModified": "2026-08-04T11:16:53.580",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5FCC9944-2B27-4800-9B5A-6C9508FEAA0D",
              "versionEndExcluding": "4.19.312",
              "versionStartIncluding": "2.6.23"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F45A0F3C-C16D-49C4-86D6-D021C3D4B834",
              "versionEndExcluding": "5.4.274",
              "versionStartIncluding": "4.20"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9CD5894E-58E9-4B4A-B0F4-3E6BC134B8F5",
              "versionEndExcluding": "5.10.215",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "577E212E-7E95-4A71-9B5C-F1D1A3AFFF46",
              "versionEndExcluding": "5.15.154",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "834D9BD5-42A6-4D74-979E-4D6D93F630FD",
              "versionEndExcluding": "6.1.84",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8018C1D0-0A5F-48D0-BC72-A2B33FDDA693",
              "versionEndExcluding": "6.6.24",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6BE9771A-BAFD-4624-95F9-58D536540C53",
              "versionEndExcluding": "6.7.12",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4C59BBC3-6495-4A77-9C82-55EC7CDF5E02",
              "versionEndExcluding": "6.8.3",
              "versionStartIncluding": "6.8"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}