CVE-2011-1751
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."
Key facts
- CVSS score
- 7.4 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:A/AC:M/Au:S/C:C/I:C/A:C- Weakness (CWE)
- CWE-20
- EPSS score
- 0.7% (55th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1750)
- Published
- June 21, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1750 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
- qemu / qemu
and 24 more…
References
- http://blog.nelhage.com/2011/08/breaking-out-of-kvm/
- http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca
- http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html
- http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html
- http://rhn.redhat.com/errata/RHSA-2011-0534.html
- http://secunia.com/advisories/44393(Vendor Advisory)
- http://secunia.com/advisories/44458(Vendor Advisory)
- http://secunia.com/advisories/44648(Vendor Advisory)
- http://secunia.com/advisories/44658(Vendor Advisory)
- http://secunia.com/advisories/44660(Vendor Advisory)
- http://secunia.com/advisories/44900(Vendor Advisory)
- http://www.openwall.com/lists/oss-security/2011/05/19/2
- http://www.osvdb.org/73395
- http://www.securityfocus.com/bid/47927
- https://bugzilla.redhat.com/show_bug.cgi?id=699773
- https://github.com/nelhage/virtunoid
- https://hermes.opensuse.org/messages/8572547
- https://www.ubuntu.com/usn/USN-1145-1/
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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