CVE-2017-12190

Advisory lineage Upstream: 0 Downstream: 23
Modified
Published: 22 Nov 2017, 18:00
Last modified:05 Aug 2024, 18:28

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.0 (nvd)
EPSS Score
0.08% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Nov 2017, 18:00
Published
Vulnerability first disclosed
05 Aug 2024, 18:28
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.0•MEDIUM•Score: 6.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.08%• Percentile: 23%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

  • CWE-772•Missing Release of Resource after Effective Lifetime

    The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

Affected Systems

  • linux•linux_kernel

    ≤ 4.13.7

References (20)