CVE-2026-58086

Estado: AnalizadaAlta (8.1)—

As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing configured by a jailed root user was therefore not flagged as privileged.

An unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright. A jailed root user therefore cannot reliably trace unprivileged processes.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Puntuación base: 8.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.38%
Percentil entre todas las CVEs puntuadas: 30
Fecha de la puntuación: 6/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement60 %

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Disable or Remove Feature or Program Application Isolation and Sandboxing

Tecnologías afectadas (1)

Freebsd — Freebsd

CWE

CWE-273

Referencias

https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-58086",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58086",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-27T15:54:51.867264Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "FreeBSD",
          "modules": [
            "ktrace"
          ],
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "15.1-RELEASE",
              "lessThan": "p2",
              "versionType": "release"
            },
            {
              "status": "affected",
              "version": "15.0-RELEASE",
              "lessThan": "p12",
              "versionType": "release"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2026-08-19T08:17:12.777",
  "references": [
    {
      "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secteam@freebsd.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-273"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user.  Tracing configured by a jailed root user was therefore not flagged as privileged.\n\nAn unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright.  A jailed root user therefore cannot reliably trace unprivileged processes."
    }
  ],
  "lastModified": "2026-08-31T18:44:55.330",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "368CFE5D-C5C2-42AF-AAF4-28DFE1A59C3B"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AA4AAA57-70A7-4717-ACF2-A253E757FF2C"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "683CEB32-A634-4363-86FB-2BDC59724E3E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9EC8EE3F-9992-4A0F-A0CD-3B44BA086BD2"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E24ABFA6-4D12-4DE5-832B-438502C7D188"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C1C9869C-494B-4628-9AA3-4AA5B989C377"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "002AA2FE-C7BA-471A-9434-0E56A878ACBF"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B187670D-E3A2-4A0D-A653-982F8B447E78"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "047E7EE9-FB51-4CF2-A8BE-484BFD819565"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C9768AE-9954-4B2A-9525-D7D4942406E7"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8B9EF55-3755-452A-B067-043803099B22"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE3C4F40-A117-4B37-8CDD-096A1A763630"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BD327D43-A2DC-49B5-A578-D2116E1E12F3"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E379873C-DA04-4EAA-ABF6-EB87B4B471A8"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BF16D01F-95EC-4FE3-B32D-135CB82E8391"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:15.1:rc3-p1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "75973F7C-645A-438C-A03B-C77AAAD20C15"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org"
}