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

Severity

 Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.06% (31st percentile)

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  • Snyk IDSNYK-ORACLE5-KERNELUEK-2511247
  • published10 Apr 2022
  • disclosed12 Apr 2016
Report a new vulnerability Found a mistake?

Introduced: 12 Apr 2016

CVE-2016-3157  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Oracle:5 kernel-uek 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 package and not the kernel-uek 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