xen: Missing check for grant table (XSA-232)
Published Sep 12, 2017
8.5
HIGHCVSS 3.0
EPSS 0.42%
Description
An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
Affected products
No data.
- 4.5.0
- 4.5.1
- 4.5.2
- 4.5.3
- 4.5.5
- 4.6.0
- 4.6.1
- 4.6.3
- 4.6.4
- 4.6.5
- 4.6.6
- 4.7.0
- 4.7.1
- 4.7.2
- 4.7.3
- 4.8.0
- 4.8.1
- 4.9.0
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
No remediation recorded yet.
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:L/UI:N/S:C/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
AV:L/AC:L/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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.42% (0.00422) | 34.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00422) | 33.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.04% (0.00044) | 10.69th | 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 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/100817 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039349 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-232.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2017-14318 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1486708 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-14318
- https://support.citrix.com/article/CTX227185 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2017-14318
- https://www.debian.org/security/2017/dsa-4050 vendor-advisoryx_refsource_DEBIAN
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/100817 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039349 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://xenbits.xen.org/xsa/advisory-232.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2017-14318 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1486708 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-14318 | ||
| https://support.citrix.com/article/CTX227185 | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2017-14318 | ||
| https://www.debian.org/security/2017/dsa-4050 | vendor-advisoryx_refsource_DEBIAN |
Change history (0)
No recorded changes yet.