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Resource Exhaustion Affecting kernel-uek-debug package, versions <0:2.6.39-400.298.1.el5uek

Severity

high

    Threat Intelligence

    EPSS
    0.06% (29th percentile)

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  • Snyk ID SNYK-ORACLE5-KERNELUEKDEBUG-2522809
  • published 10 Apr 2022
  • disclosed 22 Nov 2017
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Introduced: 22 Nov 2017

CVE-2017-12190 Open this link in a new tab
CWE-400 Open this link in a new tab

How to fix?

Upgrade Oracle:5 kernel-uek-debug to version 0:2.6.39-400.298.1.el5uek or higher.
This issue was patched in ELSA-2017-3658.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:5 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1
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Snyk

6.5 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Changed
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
Expand this section

NVD

6.5 medium
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Red Hat

6.2 medium