kernel: xen: PIRQ unmap missing range check causes hypervisor crash
Published Nov 21, 2012
2.1
LOWCVSS 2.0
EPSS 0.42%
Description
The (1) domain_pirq_to_emuirq and (2) physdev_unmap_pirq functions in Xen 2.2 allows local guest OS administrators to cause a denial of service (Xen crash) via a crafted pirq value that triggers an out-of-bounds read.
Affected products
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5. This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
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:L/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00419) | 33.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00419) | 33.27th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.08% (0.00082) | 21.65th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00064) | 30.08th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00064) | 28.17th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00064) | 26.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
No CWE recorded.
References (21)
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00008.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00009.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html vendor-advisoryx_refsource_SUSE
- http://lists.xen.org/archives/html/xen-announce/2012-11/msg00003.html mailing-listx_refsource_MLISTVendor Advisory
- http://osvdb.org/87297 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/51200 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/51324 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/51352 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/51413 third-party-advisoryx_refsource_SECUNIA
- 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.openwall.com/lists/oss-security/2012/11/13/2 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/56498 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1027760 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2012-4536 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=870096 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/80023 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2012-4536
- https://security.gentoo.org/glsa/201604-03 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2012-4536
Change history (0)
No recorded changes yet.