CVE-2017-12190

CVSS V2 Medium 4.9 CVSS V3 Medium 6.5
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.
Overview
  • CVE ID
  • CVE-2017-12190
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Modified
  • Published Version
  • 2017-11-22T18:29:00
  • Last Modified Date
  • 2023-02-12T23:27:30
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CWE-772 http://cwe.mitre.org/data/definitions/772.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 4.13.7
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 4.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2
  • Impact Score
  • 4
References
Reference URL Reference Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 Issue Tracking Patch Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95d78c28b5a85bacbc29b8dba7c04babb9b0d467 Issue Tracking Patch Vendor Advisory
http://seclists.org/oss-sec/2017/q4/52 Issue Tracking Mailing List Third Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.8 Issue Tracking Third Party Advisory
http://www.securityfocus.com/bid/101911 Issue Tracking Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:0654
https://access.redhat.com/errata/RHSA-2018:0676
https://access.redhat.com/errata/RHSA-2018:1062
https://access.redhat.com/errata/RHSA-2018:1854
https://access.redhat.com/errata/RHSA-2019:1170
https://access.redhat.com/errata/RHSA-2019:1190
https://access.redhat.com/security/cve/CVE-2017-12190
https://bugzilla.redhat.com/show_bug.cgi?id=1495089 Issue Tracking Patch Third Party Advisory
https://github.com/torvalds/linux/commit/2b04e8f6bbb196cab4b232af0f8d48ff2c7a8058 Issue Tracking Patch Third Party Advisory
https://github.com/torvalds/linux/commit/95d78c28b5a85bacbc29b8dba7c04babb9b0d467 Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
https://support.f5.com/csp/article/K93472064?utm_source=f5support&amp%3Butm_medium=RSS
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/
https://usn.ubuntu.com/3583-1/
https://usn.ubuntu.com/3583-2/
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2017-12190
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12190
History
Created Old Value New Value Data Type Notes
2022-05-10 17:21:06 Added to TrackCVE
2022-12-02 23:18:57 2017-11-22T18:29Z 2017-11-22T18:29:00 CVE Published Date updated
2022-12-02 23:18:57 2019-10-03T00:03:26 CVE Modified Date updated
2022-12-02 23:18:57 Modified Vulnerability Status updated
2023-02-02 17:06:48 2023-02-02T16:18:01 CVE Modified Date updated
2023-02-02 17:06:49 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. It was found that in the Linux kernel through v4.14-rc5, bio_map_user_iov() and bio_unmap_user() in 'block/bio.c' do unbalanced pages refcounting if IO vector has small consecutive buffers belonging to the same page. bio_add_pc_page() merges them into one, but the page reference is never dropped, causing a memory leak and possible system lockup due to out-of-memory condition. Description updated
2023-02-02 17:06:51 References updated
2023-02-13 01:07:22 2023-02-12T23:27:30 CVE Modified Date updated
2023-02-13 01:07:23 Weakness Enumeration update
2023-02-13 01:07:23 It was found that in the Linux kernel through v4.14-rc5, bio_map_user_iov() and bio_unmap_user() in 'block/bio.c' do unbalanced pages refcounting if IO vector has small consecutive buffers belonging to the same page. bio_add_pc_page() merges them into one, but the page reference is never dropped, causing a memory leak and possible system lockup due to out-of-memory condition. 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. Description updated