CVE-2011-4622 The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual i...
MediumCVSS 4.9
EPSS 0.35%
- Published
- Updated
- Exploit status
- No public exploit known
Description
The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redhat kvm | = 83 | No fix listed |
References
- SUSE-SU-2012:0616 vendor-advisory
- openSUSE-SU-2013:0925 vendor-advisory
- [kvm] 20111214 [PATCH 1/2] KVM: x86: Prevent starting PIT timers in the absence of irqchip support mailing-list patch
- [oss-security] 20111221 Re: kernel: kvm: pit timer with no irqchip crashes the system mailing-list
- RHSA-2012:0051 vendor-advisory
- 51172 vdb-entry
- 1026559 vdb-entry
- bugzilla.redhat.com