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Access Restriction Bypass Affecting kernel-uek-debug package, versions <0:2.6.39-400.293.2.el5uek

Severity

0.0
high
0
10

    Threat Intelligence

    EPSS
    0.06% (29th percentile)

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  • Snyk ID SNYK-ORACLE5-KERNELUEKDEBUG-2511121
  • published 10 Apr 2022
  • disclosed 12 Apr 2016
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Introduced: 12 Apr 2016

CVE-2016-3157 Open this link in a new tab
CWE-264 Open this link in a new tab

How to fix?

Upgrade Oracle:5 kernel-uek-debug to version 0:2.6.39-400.293.2.el5uek or higher.
This issue was patched in ELSA-2016-3657.

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 __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

References

CVSS Scores

version 3.1
Expand this section

Snyk

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

NVD

7.8 high
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Red Hat

7 high