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ubuntucveUbuntu.comUB:CVE-2017-12190
HistoryOct 12, 2017 - 12:00 a.m.

CVE-2017-12190

2017-10-1200:00:00
ubuntu.com
ubuntu.com
16

6.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

27.0%

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.

OSVersionArchitecturePackageVersionFilename
ubuntu17.10noarchlinux< 4.13.0-17.20UNKNOWN
ubuntu14.04noarchlinux< 3.13.0-142.191UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-116.140UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1014.14UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1052.61UNKNOWN
ubuntu16.04noarchlinux-azure< 4.13.0-1005.7UNKNOWN
ubuntu16.04noarchlinux-gcp< 4.13.0-1002.5UNKNOWN
ubuntu16.04noarchlinux-hwe< 4.13.0-26.29~16.04.2UNKNOWN
ubuntu18.04noarchlinux-hwe-edge< 4.18.0-8.9~18.04.1UNKNOWN
ubuntu16.04noarchlinux-hwe-edge< 4.13.0-26.29~16.04.2UNKNOWN
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1-10 of 161

6.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

4.9 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

27.0%