xen: Checks access permissions to MMIO ranges only after accessing them
Published May 3, 2017
3.8
LOWCVSS 3.0
EPSS 0.37%
Description
Xen PV guest before Xen 4.3 checked access permissions to MMIO ranges only after accessing them, allowing host PCI device space memory reads, leading to information disclosure. This is an error in the get_user function. NOTE: the upstream Xen Project considers versions before 4.5.x to be EOL.
Affected products
No data.
Configuration 2
- 2.1
- 2.1
- 5
- 11.0
- 11.0
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:L/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
AV:L/AC:L/Au:S/C:P/I:N/A:N
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.37% (0.00368) | 28.29th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.37% (0.00368) | 30.64th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00064) | 28.29th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00064) | 27.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00064) | 25.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (7)
- http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00005.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/98314 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-7995 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1448438 Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1033948 x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry
- https://nvd.nist.gov/vuln/detail/CVE-2017-7995
- https://www.cve.org/CVERecord?id=CVE-2017-7995
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00005.html | x_refsource_CONFIRMThird Party Advisory | |
| http://www.securityfocus.com/bid/98314 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-7995 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1448438 | Issue Tracking | |
| https://bugzilla.suse.com/show_bug.cgi?id=1033948 | x_refsource_CONFIRMIssue TrackingThird Party AdvisoryVDB Entry | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-7995 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-7995 |
Change history (0)
No recorded changes yet.