CVE-2017-12190

CVE Details

Release Date:2018-07-30

Description


The bio_map_user_iov and bio_unmap_user functions in block/bio.c in theLinux 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.

See more information about CVE-2017-12190 from MITRE CVE dictionary and NIST NVD


CVSS v2.0 metrics


NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.

Base Score: 4.9 Base Metrics: AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector: Local network Attack Complexity: Low
Authentication: None required Confidentiality Impact: None
Integrity Impact: None Availability Impact: Complete

Errata information


PlatformErrataRelease Date
Oracle Linux version 5 (kernel-uek)ELSA-2017-36582017-12-08
Oracle Linux version 6 (dtrace-modules-3.8.13-118.20.1.el6uek)ELSA-2017-36572017-12-07
Oracle Linux version 6 (kernel)ELSA-2018-18542018-06-25
Oracle Linux version 6 (kernel-uek)ELSA-2017-36512017-12-07
Oracle Linux version 6 (kernel-uek)ELSA-2017-36572017-12-07
Oracle Linux version 6 (kernel-uek)ELSA-2017-36582017-12-08
Oracle Linux version 7 (dtrace-modules-3.8.13-118.20.1.el7uek)ELSA-2017-36572017-12-07
Oracle Linux version 7 (kernel)ELSA-2018-10622018-04-16
Oracle Linux version 7 (kernel-uek)ELSA-2017-36512017-12-07
Oracle Linux version 7 (kernel-uek)ELSA-2017-36572017-12-07
Oracle VM version 3.3 (kernel-uek)OVMSA-2017-01732017-12-08
Oracle VM version 3.4 (kernel-uek)OVMSA-2017-01722017-12-07



This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team

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