kernel: xen: Several long latency operations are not preemptible
Published May 13, 2013
4.7
MEDIUMCVSS 2.0
EPSS 0.36%
Description
Certain page table manipulation operations in Xen 4.1.x, 4.2.x, and earlier are not preemptible, which allows local PV kernels to cause a denial of service via vectors related to "deep page table traversal."
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kernel-xen
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-xen | 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
This issue did 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. The risks associated with fixing this bug are greater than its security impact. This issue is not currently planned to be addressed in future kernel-xen updates for Red Hat Enterprise Linux 5. Using fully virtualized (HVM) guests, or PV guests with trusted kernel/administrator avoids this issue.
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: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 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 | 0.36% (0.00363) | 27.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.36% (0.00363) | 27.94th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00097) | 24.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
References (12)
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105533.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/53187 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.debian.org/security/2013/dsa-2666 vendor-advisoryx_refsource_DEBIAN
- http://www.openwall.com/lists/oss-security/2013/05/02/8 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/59615 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2013-1918 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=956163 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2013-1918
- https://www.cve.org/CVERecord?id=CVE-2013-1918
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105533.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html | vendor-advisoryx_refsource_SUSE | |
| http://secunia.com/advisories/53187 | 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.debian.org/security/2013/dsa-2666 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.openwall.com/lists/oss-security/2013/05/02/8 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/59615 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2013-1918 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=956163 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-1918 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-1918 |
Change history (0)
No recorded changes yet.