xen: grant table operations mishandle reference counts (XSA-224)
Published Jul 5, 2017
10.0
CRITICALCVSS 3.0
EPSS 2.55%
Description
The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2.
Affected products
Remediation
Red Hat mitigation
Running only HVM guests will avoid this vulnerability.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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:N/AC:L/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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.55% (0.02549) | 84.49th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.55% (0.02549) | 82.93th | v5 (v2026.06.15) |
| Jun 19, 2025 | 1.13% (0.01132) | 77.35th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.57% (0.02567) | 84.19th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.64% (0.03640) | 79.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.57% (0.02567) | 84.50th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.64% (0.00639) | 79.41th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.64% (0.00639) | 78.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.64% (0.00639) | 75.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.27% (0.01269) | 30.64th | v1 |
| Jan 6, 2022 | 1.27% (0.01269) | 29.99th | v1 |
| Sep 1, 2021 | 1.27% (0.01269) | 68.69th | v1 |
| Apr 14, 2021 | 1.27% (0.01269) | 0.00th | v1 |
References (10)
- http://www.debian.org/security/2017/dsa-3969 vendor-advisoryx_refsource_DEBIAN
- http://www.securitytracker.com/id/1038734 vdb-entryx_refsource_SECTRACK
- http://xenbits.xen.org/xsa/advisory-224.html
- https://access.redhat.com/security/cve/CVE-2017-10921 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1458878 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-10921
- https://security.gentoo.org/glsa/201708-03 vendor-advisoryx_refsource_GENTOO
- https://security.gentoo.org/glsa/201710-17 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2017-10921
- https://xenbits.xen.org/xsa/advisory-224.html x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3969 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securitytracker.com/id/1038734 | vdb-entryx_refsource_SECTRACK | |
| http://xenbits.xen.org/xsa/advisory-224.html | ||
| https://access.redhat.com/security/cve/CVE-2017-10921 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1458878 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-10921 | ||
| https://security.gentoo.org/glsa/201708-03 | vendor-advisoryx_refsource_GENTOO | |
| https://security.gentoo.org/glsa/201710-17 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2017-10921 | ||
| https://xenbits.xen.org/xsa/advisory-224.html | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.