Description
Race condition in the __kvm_migrate_pit_timer function in arch/x86/kvm/i8254.c in the KVM subsystem in the Linux kernel through 3.17.2 allows guest OS users to cause a denial of service (host OS crash) by leveraging incorrect PIT emulation.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.16.7-1 | — |
| Debian 13 | linux | 3.16.7-1 | — |
| Debian 12 | linux | 3.16.7-1 | — |
| Debian 7 | linux | 3.2.63-2+deb7u1 | DSA-3060-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-39.66 | USN-2395-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +17 | 3.10.0-123.9.2.el7 | RHSA-2014:1724 |
| RHEL 6 | perf +16 | 2.6.32-504.1.3.el6 | RHSA-2014:1843 |
| RHEL 6 | rhev-hypervisor6 | 6.6-20150123.1.el6ev | RHSA-2015:0126 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | kvm +4 | 83-270.el5_11 | RHSA-2015:0869 |
| RHEL 6.5 EUS | perf +16 | 2.6.32-431.50.1.el6 | RHSA-2015:0284 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-44.1.4.el6uek | 0.4.3-4.el6 | ELSA-2014-3084 |
| Oracle Linux 7 | dtrace-modules-3.8.13-44.1.4.el7uek | 0.4.3-4.el7 | ELSA-2014-3084 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-44.1.4.el7uek | ELSA-2014-3084 |
| Oracle Linux 7 | perf +11 | 3.10.0-123.9.2.el7 | ELSA-2014-1724 |
Advisories 9
- RHSA-2015:0126 Red Hat Security Advisory: rhev-hypervisor6 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2015:0869 Red Hat Security Advisory: kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2015:0284 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:1843 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:1724 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2395-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3060-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2014-3084 Important: Unbreakable Enterprise kernel Security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 30, 2014
- ELSA-2014-1724 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 28, 2014
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2febc839133280d5a5e8e1179c94ea674489dae2
- USN-2491-1 vendor-advisory
- USN-2418-1 vendor-advisory
- USN-2417-1 vendor-advisory
- DSA-3060 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1144878
- RHSA-2015:0869 vendor-advisory
- https://github.com/torvalds/linux/commit/2febc839133280d5a5e8e1179c94ea674489dae2
- USN-2394-1 vendor-advisory
- RHSA-2015:0284 vendor-advisory
- [oss-security] 20141024 kvm issues mailing-list
- RHSA-2015:0126 vendor-advisory