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CVE-2016-2383

Estado: ModificadaMedia (5.5)—

La función adjust_branches en kernel/bpf/verifier.c en el kernel de Linux en versiones anteriores a 4.5 no tiene en cuenta el delta en el caso de salto de retroceso, lo que permite a usuarios locales obtener información sensible del kernel de memoria creando un filtro de paquetes y posteriormente cargando instrucciones BPF manipuladas.

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 (3)

Canonical — Ubuntu LinuxLinux — Linux KernelOpensuse — Leap

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-2383",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "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:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2016-04-27T17:59:10.943",
  "references": [
    {
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2016/02/14/1",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-1",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-2",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-3",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1308452",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee383492",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1b14d27ed0965838350f1377ff97c93ee383492",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2016/02/14/1",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-1",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-2",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2947-3",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1308452",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/torvalds/linux/commit/a1b14d27ed0965838350f1377ff97c93ee383492",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information from kernel memory by creating a packet filter and then loading crafted BPF instructions."
    },
    {
      "lang": "es",
      "value": "La función adjust_branches en kernel/bpf/verifier.c en el kernel de Linux en versiones anteriores a 4.5 no tiene en cuenta el delta en el caso de salto de retroceso, lo que permite a usuarios locales obtener información sensible del kernel de memoria creando un filtro de paquetes y posteriormente cargando instrucciones BPF manipuladas."
    }
  ],
  "lastModified": "2026-06-17T00:43:56.340",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8B6177A4-8E9B-448D-A6C1-1F88863DE391",
              "versionEndExcluding": "4.5.0"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.5.0:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2BEB8150-FFE5-47FA-A056-9029F00744AA"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.5.0:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1D74F82A-BF09-477E-A12B-6E8ED832486E"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.5.0:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "57CCE12F-9DF0-4378-ABAA-BF94A361E569"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "815D70A8-47D3-459C-A32C-9FEACA0659D1"
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E88A537F-F4D0-46B9-9E37-965233C2A355"
            },
            {
              "criteria": "cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4863BE36-D16A-4D75-90D9-FD76DB5B48B7"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "security@debian.org"
}