fkie_cve-2024-27066
Vulnerability from fkie_nvd
Published
2024-05-01 13:15
Modified
2024-11-21 09:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio: packed: fix unmap leak for indirect desc table When use_dma_api and premapped are true, then the do_unmap is false. Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed. if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } } So the indirect desc table is not unmapped. This causes the unmap leak. So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment This bug does not occur, because no driver use the premapped with indirect.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio: packed: fix unmap leak for indirect desc table\n\nWhen use_dma_api and premapped are true, then the do_unmap is false.\n\nBecause the do_unmap is false, vring_unmap_extra_packed is not called by\ndetach_buf_packed.\n\n  if (unlikely(vq-\u003edo_unmap)) {\n                curr = id;\n                for (i = 0; i \u003c state-\u003enum; i++) {\n                        vring_unmap_extra_packed(vq,\n                                                 \u0026vq-\u003epacked.desc_extra[curr]);\n                        curr = vq-\u003epacked.desc_extra[curr].next;\n                }\n  }\n\nSo the indirect desc table is not unmapped. This causes the unmap leak.\n\nSo here, we check vq-\u003euse_dma_api instead. Synchronously, dma info is\nupdated based on use_dma_api judgment\n\nThis bug does not occur, because no driver use the premapped with\nindirect."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: virtio: empaquetado: corrige la fuga de desasignaci\u00f3n para la tabla desc indirecta Cuando use_dma_api y premapped son verdaderos, entonces do_unmap es falso. Debido a que do_unmap es falso, detach_buf_packed no llama a vring_unmap_extra_packed. if (improbable(vq-\u0026gt;do_unmap)) { curr = id; for (i = 0; i \u0026lt; estado-\u0026gt;num; i++) { vring_unmap_extra_packed(vq, \u0026amp;vq-\u0026gt;packed.desc_extra[curr]); curr = vq-\u0026gt;packed.desc_extra[curr].next; } } Por lo tanto, la tabla de descripci\u00f3n indirecta no est\u00e1 desasignada. Esto provoca la fuga de desasignaci\u00f3n. As\u00ed que aqu\u00ed marcamos vq-\u0026gt;use_dma_api en su lugar. Sincr\u00f3nicamente, la informaci\u00f3n de dma se actualiza seg\u00fan el criterio use_dma_api. Este error no ocurre porque ning\u00fan controlador utiliza el preasignado con indirecto."
    }
  ],
  "id": "CVE-2024-27066",
  "lastModified": "2024-11-21T09:03:47.367",
  "metrics": {},
  "published": "2024-05-01T13:15:50.850",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.