MEDIUM
tss_alloc in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 has a Local Denial of Service (system crash) due to incorrect I/O port access control on the i386 architecture
Published Aug 1, 2018
5.5
MEDIUMCVSS 3.0
EPSS 0.34%
Description
tss_alloc in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 has a Local Denial of Service (system crash) due to incorrect I/O port access control on the i386 architecture.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.5 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
4.9 MEDIUM NVD
AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.34% 0.00341
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00341
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 (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.34% (0.00341) | 25.24th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.34% (0.00341) | 27.74th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | 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 | 0.83% (0.00829) | 22.25th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00829) | 0.00th | v1 |
Weaknesses (1)
References (5)
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c x_refsource_MISCIssue TrackingPatchVendor Advisory
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c.diff?r1=1.37&r2=1.37.8.1&f=h x_refsource_MISCPatchVendor Advisory
- http://www.securitytracker.com/id/1041550 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/020_ioport.patch.sig x_refsource_MISCPatchVendor Advisory
- https://ftp.openbsd.org/pub/OpenBSD/patches/6.3/common/015_ioport.patch.sig x_refsource_MISCPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c | x_refsource_MISCIssue TrackingPatchVendor Advisory | |
| http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c.diff?r1=1.37&r2=1.37.8.1&f=h | x_refsource_MISCPatchVendor Advisory | |
| http://www.securitytracker.com/id/1041550 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/020_ioport.patch.sig | x_refsource_MISCPatchVendor Advisory | |
| https://ftp.openbsd.org/pub/OpenBSD/patches/6.3/common/015_ioport.patch.sig | x_refsource_MISCPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 1, 2018
Updated Aug 5, 2024
Reserved Aug 1, 2018
Link CVE-2018-14775
CISA Vulnrichment
Updated n/a