CVE-2016-3157
Fixed in a distro release EPSS <1%
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.
Products: xen, canonical ubuntu_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | linux | 4.5.1-1 |
| Debian 13 | linux | 4.5.1-1 |
| Debian 14 | linux | 4.5.1-1 |
| Debian 7 | linux | 3.2.81-1 |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u2 |
| Ubuntu 14.04 LTS | linux | 3.13.0-86.130 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-71.91~14.04.1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-59.65~14.04.1 |
| Ubuntu 14.04 LTS | linux-lts-wily | 4.2.0-36.41~14.04.1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-22.39~14.04.1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-22.39 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1010.12 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1013.14 |
| Ubuntu 18.04 LTS | linux-azure | no fix |
| Ubuntu 18.04 LTS | linux-gcp | no fix |
| Ubuntu 18.04 LTS | linux-hwe | no fix |
| Ubuntu 18.04 LTS | linux-hwe-edge | no fix |
| Ubuntu 20.04 LTS | linux-azure-fde | no fix |
| Ubuntu 20.04 LTS | linux-gke | no fix |
| Ubuntu 20.04 LTS | linux-gkeop | no fix |
| Ubuntu 20.04 LTS | linux-raspi2 | no fix |
| Ubuntu 20.04 LTS | linux-riscv | no fix |
| Ubuntu 22.04 LTS | linux-intel-iot-realtime | no fix |
| Ubuntu 22.04 LTS | linux-realtime | no fix |
| Ubuntu 22.04 LTS | linux-riscv | no fix |
| Ubuntu 24.04 LTS | linux-azure-6.11 | no fix |
| Ubuntu 24.04 LTS | linux-gcp-6.11 | no fix |
| Ubuntu 24.04 LTS | linux-hwe-6.11 | no fix |
| Ubuntu 24.04 LTS | linux-lowlatency-hwe-6.11 | no fix |
| Ubuntu 24.04 LTS | linux-raspi-realtime | no fix |
| Ubuntu 24.04 LTS | linux-realtime | no fix |
| Ubuntu 24.04 LTS | linux-riscv | no fix |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | no fix |