qemu: acpi_piix4: missing hotplug check during device removal
Published Jun 21, 2012
7.4
HIGHCVSS 2.0
EPSS 0.75%
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."
Affected products
No data.
- 0.1.0
- 0.1.1
- 0.1.2
- 0.1.3
- 0.1.4
- 0.1.5
- 0.1.6
- 0.2.0
- 0.3.0
- 0.4.0
- 0.4.1
- 0.4.2
- 0.4.3
- 0.5.0
- 0.5.1
- 0.5.2
- 0.5.3
- 0.5.4
- 0.5.5
- 0.6.0
- 0.6.1
- 0.7.0
- 0.7.1
- 0.7.2
- 0.8.0
- 0.8.1
- 0.8.2
- 0.9.0
- 0.9.1
- 0.9.1-5
- 0.10.0
- 0.10.1
- 0.10.2
- 0.10.3
- 0.10.4
- 0.10.5
- 0.10.6
- 0.11.0
- 0.11.0
- 0.11.0
- 0.11.0
- 0.11.0-rc0
- 0.11.0-rc1
- 0.11.0-rc2
- 0.11.1
- 0.12.0
- 0.12.0
- 0.12.0
- 0.12.1
- 0.12.2
- 0.12.3
- 0.12.4
- 0.12.5
- 0.13.0
- 0.13.0
- 0.13.0
- 0.14.0
- 0.14.0
- 0.14.0
- 0.14.0
- 0.14.1
- 0.15.0
- 0.15.0
- 1.0
- 1.0
- 1.0
- 1.0
- 1.0
- 1.0.1
- 1.1
- 1.1
- 1.1
- 1.1
- 1.1
No data.
Red Hat Enterprise Linux 6
qemu-kvm-2:0.12.1.2-2.160.el6
Fixed · RHSA-2011:0534
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm-2:0.12.1.2-2.160.el6 | Fixed | RHSA-2011:0534 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue only affects Red Hat Enterprise Linux 6. The version of the qemu/kvm as shipped with Red Hat Enterprise Linux 5 is not affected.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:A/AC:M/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.75% (0.00750) | 53.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.75% (0.00750) | 49.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.37% (0.00371) | 56.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00106) | 44.76th | v3 (v2023.03.01) |
| Jun 28, 2024 | 0.11% (0.00106) | 43.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00106) | 41.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.27th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.34th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.15th | v2 (v2022.01.01) |
References (21)
- http://blog.nelhage.com/2011/08/breaking-out-of-kvm/ x_refsource_MISC
- http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commit%3Bh=505597e4476a6bc219d0ec1362b760d71cb4fdca x_refsource_CONFIRM
- http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html mailing-listx_refsource_MLIST
- http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2011-0534.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/44393 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44458 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44648 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44658 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44660 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/44900 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.openwall.com/lists/oss-security/2011/05/19/2 mailing-listx_refsource_MLIST
- http://www.osvdb.org/73395 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/47927 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-1751 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=699773 x_refsource_MISCIssue Tracking
- https://github.com/nelhage/virtunoid x_refsource_MISC
- https://hermes.opensuse.org/messages/8572547 vendor-advisoryx_refsource_SUSE
- https://nvd.nist.gov/vuln/detail/CVE-2011-1751
- https://www.cve.org/CVERecord?id=CVE-2011-1751
- https://www.ubuntu.com/usn/USN-1145-1/ vendor-advisoryx_refsource_UBUNTU
Change history (0)
No recorded changes yet.