CVE-2010-0309: The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does n...

Security readout for executives and security teams

This vulnerability lets a user inside a KVM guest trigger a crash or hang of the host system through faulty timer emulation. It is an availability issue, not evidence of data theft or code execution. Business risk is highest where untrusted tenants or users can access guest operating systems. Exposure is likely limited to legacy Linux virtualization hosts running affected KVM/kernel packages, especially around the 2010 advisory period. Systems without KVM, without affected PIT emulation, or without guest user access are less likely exposed. Confirm through vendor package advisories rather than product names in the CVE record. Handle as a moderate-priority legacy virtualization risk. It can disrupt host availability, which may affect multiple guest workloads, but the evidence provided does not show active exploitation or remote compromise. Prioritize environments with untrusted guests or shared hosting exposure. Mitigation focus: Identify virtualization hosts running KVM or affected Linux kernel KVM packages.; Review Ubuntu USN-914-1, Red Hat RHSA-2010 advisories, and Debian DSA-1996 for applicable updates.; Apply the relevant vendor security updates for affected hosts..

Prepared

Jun 28, 2026, 03:36 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.