CVE-2017-12190

Medium

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.

Package Linux Kernel
Published 2017-11-22
Last modified 2026-05-13
CVSS version 3.0
Patch available
Awaiting data

CVSS 3.0 score

6.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weakness type

CWE-400

CVE-2017-12190 is a Uncontrolled Resource Consumption vulnerability

What is Uncontrolled Resource Consumption?

The product does not properly control the amount of resources it consumes, leading to exhaustion. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-12190 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

5 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2017-12190?

    CVE-2017-12190 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.5 out of 10 , classified as an Uncontrolled Resource Consumption flaw (CWE-400) . CVE-2017-12190 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2017-12190?

    CVE-2017-12190 has a CVSS score of 6.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H .

  • Is there a patch available for CVE-2017-12190?

    No patch is currently available for CVE-2017-12190. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2017-12190 actively exploited?

    No — CVE-2017-12190 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is Uncontrolled Resource Consumption (CWE-400)?

    The product does not properly control the amount of resources it consumes, leading to exhaustion. View CWE-400 on MITRE CWE →

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