qemu-kvm: OOB memory access caused by negative vq notifies
Published Jun 21, 2012
5.8
MEDIUMCVSS 2.0
EPSS 1.90%
Description
The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison.
Affected products
No data.
No data.
Red Hat Enterprise Linux 6
qemu-kvm-2:0.12.1.2-2.160.el6_1.2
Fixed · RHSA-2011:0919
Red Hat Enterprise Linux 5
kvm
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm-2:0.12.1.2-2.160.el6_1.2 | Fixed | RHSA-2011:0919 |
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
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:L/Au:N/C:P/I:P/A:P
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.90% (0.01903) | 78.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.90% (0.01903) | 76.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.68% (0.00682) | 69.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.57% (0.00572) | 78.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.57% (0.00572) | 77.21th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.57% (0.00572) | 74.54th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.65% (0.02646) | 82.22th | v2 (v2022.01.01) |
| Feb 13, 2023 | 2.65% (0.02646) | 81.74th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.65% (0.02646) | 80.46th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.65% (0.02646) | 61.82th | v2 (v2022.01.01) |
References (18)
- http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commitdiff%3Bh=7157e2e23e89adcd436caeab31fdd6b47eded377 x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2011-0919.html vendor-advisoryx_refsource_REDHAT
- 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/45158 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/45170 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/45301 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://ubuntu.com/usn/usn-1165-1 vendor-advisoryx_refsource_UBUNTU
- http://www.openwall.com/lists/oss-security/2011/06/28/13 mailing-listx_refsource_MLISTPatch
- http://www.openwall.com/lists/oss-security/2011/06/29/15 mailing-listx_refsource_MLISTPatch
- http://www.osvdb.org/74751 vdb-entryx_refsource_OSVDB
- https://access.redhat.com/security/cve/CVE-2011-2512 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=717399 Issue Tracking
- https://hermes.opensuse.org/messages/9605323 vendor-advisoryx_refsource_SUSE
- https://nvd.nist.gov/vuln/detail/CVE-2011-2512
- https://www.cve.org/CVERecord?id=CVE-2011-2512
- https://www.debian.org/security/2011/dsa-2270 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.