kernel: drivers: getrandom(2) unblocks too early after system boot
Published May 21, 2018
5.9
MEDIUMCVSS 3.1
EPSS 1.73%
Description
kernel drivers before version 4.17-rc1 are vulnerable to a weakness in the Linux kernel's implementation of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed before it was sufficiently generated.
Affected products
-
- Version kernel 4.17-rc1StatusaffectedConstraints-
- Version
Configuration 1
- ≤ 4.16
Configuration 2
- 16.04
- 18.04
Configuration 3
- 9.0
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Fix deferred
Red Hat Enterprise Linux 7
kernel-alt
Fix deferred
Red Hat Enterprise Linux 7
kernel-rt
Fix deferred
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/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
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.73% (0.01731) | 76.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.82% (0.01825) | 75.94th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00086) | 22.68th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.67% (0.00667) | 80.42th | v3 (v2023.03.01) |
| Apr 17, 2024 | 0.67% (0.00667) | 79.47th | v3 (v2023.03.01) |
| Dec 15, 2023 | 0.67% (0.00667) | 77.46th | v3 (v2023.03.01) |
| Nov 21, 2023 | 0.85% (0.00850) | 80.28th | v3 (v2023.03.01) |
| Oct 12, 2023 | 0.79% (0.00791) | 79.59th | v3 (v2023.03.01) |
| Sep 3, 2023 | 1.09% (0.01091) | 82.58th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.06% (0.01061) | 81.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.18% (0.01183) | 35.15th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.86% (0.01865) | 48.06th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (13)
- http://www.securityfocus.com/bid/104055 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-1108 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1567306 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1108 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-1108
- https://usn.ubuntu.com/3718-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3718-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3752-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3752-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3752-3/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-1108
- https://www.debian.org/security/2018/dsa-4188 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.