xen: IOMMU TLB flushing may be inadvertently suppressed
Published Dec 13, 2013
6.8
MEDIUMCVSS 2.0
EPSS 0.66%
Description
Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service (host crash) or gain privileges via unspecified vectors.
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 2 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:A/AC:H/Au:N/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 2, 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 2, 2026 | 0.66% (0.00661) | 49.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.66% (0.00661) | 46.61th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.39% (0.00390) | 58.02th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.26% (0.00256) | 65.88th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.26% (0.00256) | 64.43th | v3 (v2023.03.01) |
| Jun 9, 2023 | 0.26% (0.00256) | 62.11th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.28% (0.00278) | 63.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.18% (0.01183) | 61.76th | v2 (v2022.01.01) |
| Oct 19, 2022 | 1.18% (0.01183) | 60.79th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.18% (0.01183) | 58.77th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
References (12)
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/125081.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2013-December/125111.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html vendor-advisoryx_refsource_SUSE
- http://lists.xen.org/archives/html/xen-announce/2013-12/msg00002.html mailing-listx_refsource_MLIST
- http://secunia.com/advisories/55932 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://security.gentoo.org/glsa/glsa-201407-03.xml vendor-advisoryx_refsource_GENTOO
- http://www.openwall.com/lists/oss-security/2013/12/10/7 mailing-listx_refsource_MLIST
- http://www.securitytracker.com/id/1029468 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2013-6400 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1035811 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2013-6400
- https://www.cve.org/CVERecord?id=CVE-2013-6400
Change history (0)
No recorded changes yet.