VULNERABILITY INTELLIGENCE

CVE-2011-1751

CVSS score7.4 HIGH
EPSS probability0.75%
CISA KEVNot currently listed
Published2012-06-21
Last modified2026-06-16
CVSS vectorAV:A/AC:M/Au:S/C:C/I:C/A:C

Description

The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Management emulation in qemu-kvm does not check if a device is hotpluggable before unplugging the PCI-ISA bridge, which allows privileged guest users to cause a denial of service (guest crash) and possibly execute arbitrary code by sending a crafted value to the 0xae08 (PCI_EJ_BASE) I/O port, which leads to a use-after-free related to "active qemu timers."

Weakness classification

  • CWE-20: Improper Input Validation

Primary references