kernel: xen: potential use of freed memory in event channel operations
Published Apr 12, 2013
4.4
MEDIUMCVSS 2.0
EPSS 0.40%
Description
Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory pressure" and the Xen Security Module (XSM) is enabled, uses the wrong ordering of operations when extending the per-domain event channel tracking table, which causes a use-after-free and allows local guest kernels to inject arbitrary events and gain privileges via unspecified vectors.
Affected products
No data.
- 3.0.2
- 3.0.3
- 3.0.4
- 3.1.3
- 3.1.4
- 3.2.0
- 3.2.1
- 3.2.2
- 3.2.3
- 3.3.0
- 3.3.1
- 3.3.2
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 4.0.0
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.1.0
- 4.1.1
- 4.1.2
- 4.1.3
- 4.1.4
- 4.2.0
- 4.2.1
No data.
Red Hat Enterprise Linux 5
kernel-xen
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-xen | Not affected | n/a |
No package ranges for this CVE.
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:M/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.40% (0.00401) | 31.90th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.40% (0.00401) | 31.61th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00064) | 17.06th | 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) |
References (17)
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00015.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2013-06/msg00049.html vendor-advisoryx_refsource_SUSE
- http://lists.xen.org/archives/html/xen-announce/2013-04/msg00000.html mailing-listx_refsource_MLISTPatchVendor Advisory
- http://osvdb.org/92050 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/52857 third-party-advisoryx_refsource_SECUNIAVendor 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.openwall.com/lists/oss-security/2013/04/04/7 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/58880 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1028388 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2013-1920 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=950097 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/83226 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2013-1920
- https://www.cve.org/CVERecord?id=CVE-2013-1920
Change history (0)
No recorded changes yet.