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.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | alpine-linux-upgrade-xen | Aug 30, 2017 | Apr 19, 2016 |
| Amazon_linux | — | amazon-linux-upgrade-kernel | Apr 20, 2016 | Apr 12, 2016 |
| Debian | debian-upgrade-linux | Jun 28, 2016 | Apr 12, 2016 | |
| Oracle_linux | — | oracle-linux-upgrade-kernel-uek | Apr 12, 2016 | Mar 16, 2016 |
| Redhat_linux | — | no-fix-redhat-rpm-package | Jul 9, 2025 | Mar 16, 2016 |
| Ubuntu | ubuntu-upgrade-linux-image-3-13-0-86-genericubuntu-upgrade-linux-image-3-13-0-86-generic-lpaeubuntu-upgrade-linux-image-3-13-0-86-lowlatencyubuntu-upgrade-linux-image-3-13-0-86-powerpc-e500ubuntu-upgrade-linux-image-3-13-0-86-powerpc-e500mcubuntu-upgrade-linux-image-3-13-0-86-powerpc-smpubuntu-upgrade-linux-image-3-13-0-86-powerpc64-embubuntu-upgrade-linux-image-3-13-0-86-powerpc64-smpubuntu-upgrade-linux-image-3-16-0-71-genericubuntu-upgrade-linux-image-3-16-0-71-generic-lpaeubuntu-upgrade-linux-image-3-16-0-71-lowlatencyubuntu-upgrade-linux-image-3-16-0-71-powerpc-e500mcubuntu-upgrade-linux-image-3-16-0-71-powerpc-smpubuntu-upgrade-linux-image-3-16-0-71-powerpc64-embubuntu-upgrade-linux-image-3-16-0-71-powerpc64-smpubuntu-upgrade-linux-image-3-19-0-59-genericubuntu-upgrade-linux-image-3-19-0-59-generic-lpaeubuntu-upgrade-linux-image-3-19-0-59-lowlatencyubuntu-upgrade-linux-image-3-19-0-59-powerpc-e500mcubuntu-upgrade-linux-image-3-19-0-59-powerpc-smpubuntu-upgrade-linux-image-3-19-0-59-powerpc64-embubuntu-upgrade-linux-image-3-19-0-59-powerpc64-smpubuntu-upgrade-linux-image-3-2-0-104-genericubuntu-upgrade-linux-image-3-2-0-104-generic-paeubuntu-upgrade-linux-image-3-2-0-104-highbankubuntu-upgrade-linux-image-3-2-0-104-omapubuntu-upgrade-linux-image-3-2-0-104-powerpc-smpubuntu-upgrade-linux-image-3-2-0-104-powerpc64-smpubuntu-upgrade-linux-image-3-2-0-104-virtualubuntu-upgrade-linux-image-3-2-0-1482-omap4ubuntu-upgrade-linux-image-4-2-0-1029-raspi2ubuntu-upgrade-linux-image-4-2-0-36-genericubuntu-upgrade-linux-image-4-2-0-36-generic-lpaeubuntu-upgrade-linux-image-4-2-0-36-lowlatencyubuntu-upgrade-linux-image-4-2-0-36-powerpc-e500mcubuntu-upgrade-linux-image-4-2-0-36-powerpc-smpubuntu-upgrade-linux-image-4-2-0-36-powerpc64-embubuntu-upgrade-linux-image-4-2-0-36-powerpc64-smpubuntu-upgrade-linux-image-4-4-0-1010-raspi2ubuntu-upgrade-linux-image-4-4-0-1013-snapdragonubuntu-upgrade-linux-image-4-4-0-22-genericubuntu-upgrade-linux-image-4-4-0-22-generic-lpaeubuntu-upgrade-linux-image-4-4-0-22-lowlatencyubuntu-upgrade-linux-image-4-4-0-22-powerpc-e500mcubuntu-upgrade-linux-image-4-4-0-22-powerpc-smpubuntu-upgrade-linux-image-4-4-0-22-powerpc64-embubuntu-upgrade-linux-image-4-4-0-22-powerpc64-smp | May 6, 2016 | Apr 12, 2016 |
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