« Volver al listado

CVE-2025-21904

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

caif_virtio: fix wrong pointer check in cfv_probe()

del_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked for NULL before calling it, not cfv->vdev. Also the current implementation is redundant because the pointer cfv->vdev is dereferenced before it is checked for NULL.

Fix this by checking cfv->vq_tx for NULL instead of cfv->vdev before calling del_vqs().

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 (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-21904",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21904",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-01T19:24:28.456354Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "990fff6980d0c1693d60a812f58dbf93eab0473f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "7b5fe58959822e6cfa884327cabba6be3b01883d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "29e0cd296c87240278e2f7ea4cf3f496b60c03af",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "90d302619ee7ce5ed0c69c29c290bdccfde66418",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "56cddf71cce3b15b078e937fadab29962b6f6643",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0d2e1a2926b1839a4b74519e660739b2566c9386",
              "lessThan": "a466fd7e9fafd975949e5945e2f70c33a94b1a70",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/caif/caif_virtio.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.4.291",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "status": "unaffected",
              "version": "5.10.235",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.179",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.131",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.83",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.19",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13.7",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/caif/caif_virtio.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-04-01T16:15:20.857",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03af",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncaif_virtio: fix wrong pointer check in cfv_probe()\n\ndel_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked\nfor NULL before calling it, not cfv->vdev. Also the current implementation\nis redundant because the pointer cfv->vdev is dereferenced before it is\nchecked for NULL.\n\nFix this by checking cfv->vq_tx for NULL instead of cfv->vdev before\ncalling del_vqs()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: caif_virtio: se corrige una comprobación incorrecta del puntero en cfv_probe() del_vqs() libera colas virtuales. Por lo tanto, se debe comprobar si el puntero cfv->vq_tx es nulo antes de llamarlo, no cfv->vdev. Además, la implementación actual es redundante porque se desreferencia el puntero cfv->vdev antes de comprobar si es nulo. Para solucionar esto, compruebe si el puntero cfv->vq_tx es nulo en lugar de cfv->vdev antes de llamar a del_vqs()."
    }
  ],
  "lastModified": "2026-06-17T08:44:34.383",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0ACA7A2C-C4C2-4035-B2FD-0D544B71CC80",
              "versionEndExcluding": "5.4.291",
              "versionStartIncluding": "3.10"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "545121FA-DE31-4154-9446-C2000FB4104D",
              "versionEndExcluding": "5.10.235",
              "versionStartIncluding": "5.5"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C708062C-4E1B-465F-AE6D-C09C46400875",
              "versionEndExcluding": "5.15.179",
              "versionStartIncluding": "5.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA9C2DE3-D37C-46C6-8DCD-2EE509456E0B",
              "versionEndExcluding": "6.1.131",
              "versionStartIncluding": "5.16"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7D9F642F-6E05-4926-B0FE-62F95B7266BC",
              "versionEndExcluding": "6.6.83",
              "versionStartIncluding": "6.2"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "32865E5C-8AE1-4D3D-A64D-299039694A88",
              "versionEndExcluding": "6.12.19",
              "versionStartIncluding": "6.7"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "842F5A44-3E71-4546-B4FD-43B0ACE3F32B",
              "versionEndExcluding": "6.13.7",
              "versionStartIncluding": "6.13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "186716B6-2B66-4BD0-852E-D48E71C0C85F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0D3E781C-403A-498F-9DA9-ECEE50F41E75"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "66619FB8-0AAF-4166-B2CF-67B24143261D"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D3D6550E-6679-4560-902D-AF52DCFE905B"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "45B90F6B-BEC7-4D4E-883A-9DBADE021750"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}