{"id":"CVE-2011-1751","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-1751","generatedAt":"2026-10-27T19:51:11.635Z","title":"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…","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.\"","published":"2012-06-21T15:55:10.000Z","lastModified":"2026-06-16T23:29:57.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":7.4,"severity":"HIGH","vector":"AV:A/AC:M/Au:S/C:C/I:C/A:C"},"cwe":["CWE-20"],"affected":["qemu/qemu"],"epss":{"score":0.00741,"percentile":0.54377,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://blog.nelhage.com/2011/08/breaking-out-of-kvm/","source":"secalert@redhat.com"},{"url":"http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca","source":"secalert@redhat.com"},{"url":"http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2011-0534.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44393","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44458","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44648","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44658","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44660","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/44900","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2011/05/19/2","source":"secalert@redhat.com"},{"url":"http://www.osvdb.org/73395","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/47927","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=699773","source":"secalert@redhat.com"},{"url":"https://github.com/nelhage/virtunoid","source":"secalert@redhat.com"},{"url":"https://hermes.opensuse.org/messages/8572547","source":"secalert@redhat.com"},{"url":"https://www.ubuntu.com/usn/USN-1145-1/","source":"secalert@redhat.com"},{"url":"http://blog.nelhage.com/2011/08/breaking-out-of-kvm/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2011-0534.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44393","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44458","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44648","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44658","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44660","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/44900","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2011/05/19/2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/73395","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/47927","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=699773","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/nelhage/virtunoid","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hermes.opensuse.org/messages/8572547","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.ubuntu.com/usn/USN-1145-1/","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-1751","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}