Vulnerability in Red Hat Kvm
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 interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.9 (Medium). Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.003 (25.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.003 · change: -0.000
Affected products
- Red Hat Kvm — versions 83
References
- www.redhat.com/support/errata/RHSA-2012-0051.html (vendor-advisory)
- bugzilla.redhat.com/show_bug.cgi
- www.securityfocus.com/bid/51172 (vdb-entry)
- www.openwall.com/lists/oss-security/2011/12/21/7 (mailing-list)
- permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564 (mailing-list, Patch)
- lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html (vendor-advisory)
- www.securitytracker.com/id (vdb-entry)