CVE-2017-12190 (GCVE-0-2017-12190)

Vulnerability from cvelistv5 – Published: 2017-11-22 18:00 – Updated: 2024-08-05 18:28
VLAI
Summary
The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition.
Severity
6.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1046 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
n/a Linux kernel through v4.14-rc5 Affected: Linux kernel through v4.14-rc5
Date Public
2017-11-22 00:00
Show details on NVD website
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux kernel before 4.13.8 do unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition."
          },
          {
            "lang": "es",
            "value": "Las funciones bio_map_user_iov y bio_unmap_user en block/bio.c en el kernel de Linux en versiones anteriores a la 4.13.8 realizan un refcount no equilibrado cuando un vector SCSI I/O tiene b\u00faferes peque\u00f1os consecutivos que pertenecen a la misma p\u00e1gina. La funci\u00f3n bio_add_pc_page los combina en uno solo, pero la referencia de la p\u00e1gina nunca se anula. Esto provoca una fuga de memoria y un posible bloqueo del sistema (explotable contra el host del sistema operativo por un usuario invitado del sistema operativo, si se pasa un disco SCSI a una m\u00e1quina virtual) debido a una condici\u00f3n de falta de memoria."
          }
        ],
        "id": "CVE-2017-12190",
        "lastModified": "2026-05-13T00:24:29.033",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 4.9,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 6.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
                "version": "3.0"
              },
              "exploitabilityScore": 2.0,
              "impactScore": 4.0,
              "source": "nvd@nist.gov",
              "type": "Primary"
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        },
        "published": "2017-11-22T18:29:00.477",
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      "cve": "CVE-2017-12190",
      "id": "CVE-2017-12190",
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      "product_status:fixed": "557",
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      "source": "Red Hat CSAF VEX",
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      "id": "CVE-2017-12190",
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      "product_status:known_not_affected": "146",
      "product_status:recommended": "514",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2017-12190",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2017-12190.json",
      "version": "15"
    }
  }
}



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