HIGH
CVE-2011-1751
CWE-20Published: June 21, 2012· Updated: Jun 16, 2026
7.4
CVSS v3.1
Official 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."
Technical Analysis
CVE-2011-1751 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:A/AC:M/Au:S/C:C/I:C/A:C
Affected Vendors & Products
qemu1 product(s)
qemu
Source: NVD CPE · 55 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (36)
→
http://secunia.com/advisories/44393Vendor Advisory
→
http://secunia.com/advisories/44458Vendor Advisory
→
http://secunia.com/advisories/44648Vendor Advisory
→
http://secunia.com/advisories/44658Vendor Advisory
→
http://secunia.com/advisories/44660Vendor Advisory
→
http://secunia.com/advisories/44900Vendor Advisory
Quick Facts
CVE IDCVE-2011-1751
CVSS Score7.4 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedJun 21, 2012
Related CVEs (CWE-20)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2011-1751 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.