Description
The apic_get_tmcct function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through 3.12.5 allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via crafted modifications of the TMICT value.
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 | 3.12.5-1 | — |
| Debian 13 | linux | 3.12.5-1 | — |
| Debian 12 | linux | 3.12.5-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze5 | DSA-2906-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +15 | 2.6.32-431.1.2.el6 | RHSA-2013:1801 |
| RHEL 6 | rhev-hypervisor6 | 6.5-20131204.0.3.2.el6_5 | RHSA-2013:1802 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Virtualization 5 | kvm +4 | 83-266.el5_10.1 | RHSA-2014:0163 |
| RHEL 6.4 EUS | perf +14 | 2.6.32-358.37.1.el6 | RHSA-2014:0284 |
Advisories 5
- RHSA-2014:0284 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2014:0163 Red Hat Security Advisory: kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1802 Red Hat Security Advisory: rhev-hypervisor6 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2013:1801 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2906-1 linux-2.6 - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-2135-1 vendor-advisory
- openSUSE-SU-2014:0247 vendor-advisory
- USN-2138-1 vendor-advisory
- USN-2113-1 vendor-advisory
- USN-2141-1 vendor-advisory
- [oss-security] 20131212 Re: [vs-plain] kvm issues mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b963a22e6d1a266a67e9eecc88134713fd54775c
- 64270 vdb-entry
- https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.54
- USN-2110-1 vendor-advisory
- USN-2129-1 vendor-advisory
- USN-2136-1 vendor-advisory
- USN-2128-1 vendor-advisory
- USN-2139-1 vendor-advisory
- USN-2117-1 vendor-advisory
- RHSA-2013:1801 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1032207
- USN-2109-1 vendor-advisory
- RHSA-2014:0284 vendor-advisory
- RHSA-2014:0163 vendor-advisory
- https://github.com/torvalds/linux/commit/b963a22e6d1a266a67e9eecc88134713fd54775c
- openSUSE-SU-2014:0204 vendor-advisory
- openSUSE-SU-2014:0205 vendor-advisory