CVE & CISA-KEV Catalog

CVE-2017-12190

MEDIUM
6.5
CVSS v3
NVD

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.

CWE-400Resource ExhaustionCWE-772

How to fix

Remediation Available
linuxDebian
Fixed in:4.13.10-1CVE-2017-12190
Fixed in:4.13.10-1CVE-2017-12190
Fixed in:4.13.10-1CVE-2017-12190
Fixed in:4.13.10-1CVE-2017-12190
linuxUbuntu
Fixed in:3.13.0-142.191USN-3583-1
Fixed in:4.4.0-116.140USN-3582-1
linux-awsUbuntu
Fixed in:4.4.0-1014.14USN-3582-2
Fixed in:4.4.0-1052.61USN-3582-1
linux-image-3.13.0-142-genericUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-generic-lpaeUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-lowlatencyUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-powerpc-e500Ubuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-powerpc-e500mcUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-powerpc-smpUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-powerpc64-embUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-3.13.0-142-powerpc64-smpUbuntu
Fixed in:3.13.0-142.191USN-3583-1
linux-image-4.4.0-1014-awsUbuntu
Fixed in:4.4.0-1014.14USN-3582-2
linux-image-4.4.0-1019-kvmUbuntu
Fixed in:4.4.0-1019.24USN-3582-1
linux-image-4.4.0-1052-awsUbuntu
Fixed in:4.4.0-1052.61USN-3582-1
linux-image-4.4.0-1085-raspi2Ubuntu
Fixed in:4.4.0-1085.93USN-3582-1
linux-image-4.4.0-1087-snapdragonUbuntu
Fixed in:4.4.0-1087.92USN-3582-1
linux-image-4.4.0-116-genericUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-generic-lpaeUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-lowlatencyUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-powerpc-e500mcUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-powerpc-smpUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-powerpc64-embUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-image-4.4.0-116-powerpc64-smpUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
Fixed in:4.4.0-116.140USN-3582-1
linux-kvmUbuntu
Fixed in:4.4.0-1019.24USN-3582-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-116.140~14.04.1USN-3582-2
linux-raspi2Ubuntu
Fixed in:4.4.0-1085.93USN-3582-1
linux-snapdragonUbuntu
Fixed in:4.4.0-1087.92USN-3582-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

0.53%probability of exploitation in 30 days
41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-44487High7.5100%KEVFix
CVE-2021-44228Critical10.0100%KEV + RansomFix
CVE-2011-3192High7.899%-Fix
CVE-2019-11478Medium5.395%-Fix
CVE-2024-25617Medium5.389%-Fix
CVE-2018-1000115High7.589%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.