CVE-2017-12190 - CVE House

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Status published Medium CVE-2017-12190

The bio_map_user_iov and bio_unmap_user functions in block/bio.c in the Linux...

6.5 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from n/a

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Affected Vendor

n/a

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Affected Software

Linux kernel through v4.14-rc5

Vulnerable Versions:

Linux kernel through v4.14-rc5

Timeline

Official Publish: November 22nd, 2017

Last Modified: August 5th, 2024

Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service

T1498 Network Denial of Service