kernel: xen: HVM guest user mode MMIO emulation DoS
Published Dec 3, 2012
1.9
LOWCVSS 2.0
EPSS 0.64%
Description
The handle_mmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service (guest OS crash) via unspecified operations on MMIO regions.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 5
kernel-xen
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 5 | kernel-xen | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. The versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG are not affected. The versions of the kernel-xen packages as shipped with Red Hat Enterprise Linux 5 are not affected as they implement a different MMIO emulation mechanism.
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:L/AC:M/Au:N/C:N/I:N/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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.64% (0.00642) | 48.89th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.64% (0.00642) | 45.78th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.42% (0.01420) | 78.79th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.18% (0.04182) | 80.84th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.08% (0.01078) | 76.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.12% (0.00119) | 47.65th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.12% (0.00119) | 46.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00119) | 44.21th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00024.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00025.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html vendor-advisoryx_refsource_SUSE
- http://lists.xen.org/archives/html/xen-devel/2012-07/msg01649.html mailing-listx_refsource_MLISTExploitVendor Advisory
- http://secunia.com/advisories/55082 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-201309-24.xml vendor-advisoryx_refsource_GENTOO
- http://www.debian.org/security/2012/dsa-2531 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/54691 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2012-3432 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=843570 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-3432
- https://www.cve.org/CVERecord?id=CVE-2012-3432
Change history (0)
No recorded changes yet.