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UBUNTU-CVE-2016-3157 High

UBUNTU-CVE-2016-3157

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.

Exploit probability Not scored
Published April 12, 2016
Required by Not available
Last source change August 17, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:14.04:LTS linux

88 explicit affected versions

Ubuntu:14.04:LTS linux-lts-utopic

40 explicit affected versions

Ubuntu:14.04:LTS linux-lts-vivid

24 explicit affected versions

Ubuntu:14.04:LTS linux-lts-wily

11 explicit affected versions

Ubuntu:14.04:LTS linux-lts-xenial

5 explicit affected versions

Ubuntu:16.04:LTS linux

24 explicit affected versions

Ubuntu:16.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:16.04:LTS linux-snapdragon

1 explicit affected versions

Ubuntu:18.04:LTS linux-azure

44 explicit affected versions

Ubuntu:18.04:LTS linux-gcp

38 explicit affected versions

Ubuntu:18.04:LTS linux-hwe

43 explicit affected versions

Ubuntu:18.04:LTS linux-hwe-edge

10 explicit affected versions

Ubuntu:20.04:LTS linux-azure-fde

26 explicit affected versions

Ubuntu:20.04:LTS linux-gke

51 explicit affected versions

Ubuntu:20.04:LTS linux-gkeop

78 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:20.04:LTS linux-riscv

12 explicit affected versions

Ubuntu:22.04:LTS linux-intel-iot-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

Ubuntu:22.04:LTS linux-riscv

23 explicit affected versions

Ubuntu:24.04:LTS linux-azure-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-gcp-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-hwe-6.11

8 explicit affected versions

Ubuntu:24.04:LTS linux-lowlatency-hwe-6.11

7 explicit affected versions

Ubuntu:24.04:LTS linux-raspi-realtime

1 explicit affected versions

Ubuntu:24.04:LTS linux-realtime

1 explicit affected versions

Ubuntu:24.04:LTS linux-riscv

24 explicit affected versions

Ubuntu:Pro:20.04:LTS linux-azure-fde-5.15

61 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

related USN-2968-2
related USN-2971-1
related USN-2971-3
related USN-2996-1
related USN-2997-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2016-3157

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.

View original source

05 / REFERENCES

Further evidence