xen: XENMEM_exchange error handling may cause DoS to host
Published Dec 17, 2015
6.2
MEDIUMCVSS 3.0
EPSS 0.38%
Description
The memory_exchange function in common/memory.c in Xen 3.2.x through 4.6.x does not properly hand back pages to a domain, which might allow guest OS administrators to cause a denial of service (host crash) via unspecified vectors related to domain teardown.
Affected products
No data.
- 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
- 4.1.5
- 4.1.6
- 4.1.6.1
- 4.2.0
- 4.2.1
- 4.2.2
- 4.2.3
- 4.2.4
- 4.2.5
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.4.0
- 4.4.1
- 4.4.2
- 4.4.3
- 4.5.0
- 4.5.1
- 4.5.2
- 4.6.0
No data.
Red Hat Enterprise Linux 5
xen
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | xen | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7, MRG-2 and realtime kernels. At this time, there is no plans to fix this issue, if you feel that this issue is affecting your deployment and have an EUS subscription, please contact support to have this issue correctly prioritized
Red Hat mitigation
The vulnerability can be avoided if the guest kernel is controlled by the host rather than guest administrator, provided that further steps are taken to prevent the guest administrator from loading code into the kernel (e.g. by disabling loadable modules etc) or from using other mechanisms which allow them to run code at kernel privilege. In Xen HVM, controlling the guest's kernel would involve locking down the bootloader.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 | 0.38% (0.00383) | 29.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00383) | 29.83th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00108) | 26.60th | 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 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://support.citrix.com/article/CTX203451 x_refsource_CONFIRMPatch
- http://www.debian.org/security/2016/dsa-3519 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/79038 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1034391 vdb-entryx_refsource_SECTRACK
- http://xenbits.xen.org/xsa/advisory-159.html x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2015-8339 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1284919 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-8339
- https://security.gentoo.org/glsa/201604-03 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-8339
| Link | Providers | Tags |
|---|---|---|
| http://support.citrix.com/article/CTX203451 | x_refsource_CONFIRMPatch | |
| http://www.debian.org/security/2016/dsa-3519 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/79038 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1034391 | vdb-entryx_refsource_SECTRACK | |
| http://xenbits.xen.org/xsa/advisory-159.html | x_refsource_CONFIRMVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2015-8339 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1284919 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-8339 | ||
| https://security.gentoo.org/glsa/201604-03 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2015-8339 |
Change history (0)
No recorded changes yet.